Between My Brother and Me: Ab Initio / Characters

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Serena

"Duelist beware, you're in...for a scare!

A tomboy who always is shown with a trademark baseball cap and jacket, she loves anything and everything spooky. She is close friends with Mokuba and is the girlfriend of Millefeui. She uses a Ghostrick Deck but is shown to have a secondary deck known as a "Nightmare" (based off of characters from Goosebumps).

Her Alea Iacat Est story is "Nightmare Troubadour".

Adaptation Personality Change: Serena in the anime was sweet and girly and hated ghosts. Serena in this story is tomboyish, loves spooky things and more adventurous.
Berserk Button: Disrespecting her jacket, seeing as it was a gift from her (deceased) brother. Better yet, saying anything bad about her brother is guaranteed to get your teeth kicked in.
Big Brother Worship: She absolutely adored her brother and insulting him is her Berserk Button.
Butch Lesbian: The tomboy in comparison to her girlfriend, Millefeui.
Catchphrase:
- "Duelist beware, you're in...for a scare!" (When she starts a duel)
- "That's sure to give you goosebumps!" (When she wins)
- "If you think (whatever she's facing) is gonna scare me, then let me tell you something...You can't scare me!" (signalling her Heroic Second Wind)
- "Go eat worms!" (her version of a Precision F-Strike)
Cosplay Otaku Girl: A downplayed version. She dressed up as Daemona Prune in her battle against Marcus in the Alea Iacta Est story "Nightmare Troubadour".
Cute Witch: Her costume for the Spirit Festival in Ab Initio. Also, Ghostrick Witch is her signature monster.
Dark Is Not Evil: Wields the Dark-attribute Ghostrick monsters, loves spooky things and her favorite holiday is Halloween. She's a good guy through and through.
Deadpan Snarker: Can be a bit snarky when the situation calls for it.
Expy: A timid girly-girl who entered a haunted mansion by older teens in a dare, only to encounter various monsters that changed her viewset to love the macabre...are we talking Serena or Hannah-Marie?
In-Series Nickname:
- Her Ghostrick monsters like calling her "Satoshi", which is the name of her (deceased) older brother. Marcus in the Alea Iacta Est story "Nightmare Troubadour" calls her "Skate" and "Lucy Dark".
- The Haunted Mansion that changed her life is called "The House of No Return" because it marked the point in her life where she could no longer be a girly-girl afraid of the dark.
It Was a Gift: Her cap and jacket were from her (deceased) older brother and she is very protective of them. The fact that she finds it abandoned in In Somnis Veritas (after she gave it to Mokuba to hide the fact that he's dressed as Alice Liddell) causes her to scream at Seto Kaiba as to what happened.
Mythology Gag: Her tomboy wear is essentially based on the XY&Z episode where she had to dress up as Ash.
- Tomboyish Baseball Cap: She's a total tomboy, in case you didn't notice.
Nightmare Fetishist: Loves nightmarish things, as shown by her use of Ghostrick monsters. She states during her duel with Lily in In Somnis Veritas that it derives from her encounter with her older brother, Satoshi, who told her not to be afraid of monsters in the dark.
The Rival: To Hikari. Neither girl has fondness for another and was said to be Hate at First Sight.
Rollerblade Good: She travels by using sneakers that turn into skates with a push of a button. It's because of this that Marcus nicknames her as "Skate" when they meet in Alea Iacta Est.
Tomboy: Dresses in jeans, a jacket and baseball cap and is into nightmarish things.
- Tomboy with a Girly Streak: That says she does cosplay as Ghostrick Witch in Ab Initio and her Ghostrick Deck is cutesy. And since Millefeui's deck (a Madolche one) was originally Serena's, then she also used to be quite girly.
Weak, but Skilled: Ghostrick monsters aren't known for their strength, so Serena makes up for it with numerous Trap Cards and their effects to even the playing field.

Haruka Sakurada

"The Wheels of Fate are turning..."

A fortune-teller and exceptional duelist, Haruka is a deadly force to be reckoned with. Normally wields a Prophecy deck but Alea Iacta Est reveals that she has a F.A deck for Turbo Duels.

Her Alea Iacta Est story is "Before the Storm".

The Ace: She's said to be one of the strongest duelists of her age group. In Ab Initio, the audience notes that Ash is lucky if he could even get her down to half of her lifepoints and Lux ex Tenebris has Shooti comment that it's a long way until someone hands her a loss.
- She's also beloved in her Drama Club as the Alea Iacta Est story "A Little Princess" reveals.
Animal Motif: Butterflies as revealed in the Alea Iacta Est story "Before the Storm". Her D-Wheel is modeled after the Black Swallowtail butterfly, her magic circle can form into burning butterflies and she wears a shirt with numerous crimson butterflies on it.
Berserk Button:
- Insulting her dueling skills is enough to make her blinded by her own strategy and almost cost her a duel against Ash in Ab Initio.
- She despises Harpie Lady monsters as revealed the Alea Iacta Est story "Before the Storm".
Cool Board: Gains one for her birthday in the Alea Iacta Est story "A Little Princess", courtesy of her father. In Somnis Veritas reveals that she named it Waite-Smith.
Crash-Into Hello: She bumps into Yugo on his D-Wheel in the Alea Iacta Est story "Before the Storm" this way, which later evolves into Meet Cute.
Cute Witch: She's a witch on her mother's side as revealed in the Alea Iacta Est story "A Little Princess".
Expy: The Alea Iacta Est story "Before the Storm" gives her similarities with Rachel Amber. She's well loved in the drama club and she has a connection to fire and wind. The story even ends with her screaming in agony as a tree ignites on fire, just like Rachel does in "Awake".
Fangirl: She's a huge fan of Team Satisfaction, gushing over dolls Millefeui made of their likeness, and jumps for joy when she receives her own vest similar to the ones they wear for her birthday (delivered to her by Yusei Fudo herself, although she doesn't realize this). She duels Crow in In Somnis Veritas and participates in a Turbo Action Duel in the Alea Iacta Est story "Before the Storm".
Flower Motifs: Her magic circle and skateboard are decorated with red five-petal flowers.
Fortune Teller: She reads Tarot cards and her deck is based off of cards from the Major Arcana. In Ab Antiquo, she is dressed as Crystal Seer.
Genki Girl: Energetic, lively, full of spirit and has a fiery personality to boot.
Girls Love Stuffed Animals: Gains a collection of cloth dolls based on Team Satisfaction from Millefeui in the Alea Iacta Est story "A Little Princess".
- Living Toys/Familiar: The four dolls can move, talk and even eat which is something that's impossible since Millefeui isn't a witch (although the dolls claim she has magic in regards to dolls).
Girly Bruiser: She's a Fangirl of what is essentially a dueling Boy Band, partakes in Drama and duels with a Tarot Deck surprisingly well that she's well known for her high win-lose streak. With emphasis on "win".
Girly Girl with a Tomboy Streak: She plays Tarot monsters and loves dolls, but she's also into Turbo Duels and has an F.A. deck she uses just for that occasion.
Irony: She represented by the High Priestess and her magic is of fire...but the element for High Priestess is based on Water.
Love at First Sight: Falls in love with Yugo over the Alea Iacta Est story "Before the Storm".
Lunacy: She has several moon references; she's represented by the High Priestess (who has a moon headdress), her satchel has the Tarot card of The Moon painted on it, and in the Alea Iacta Est story "Before the Storm" the narrative has her think of Yugo's yellow bangs like the waning crescent of the moon and she tells him that one of the The Legend of Zelda games she has played is Majora's Mask (whose plot involves the moon)
Mythology Gag:
- Her title of "The Princess of Prophecy" is based on the title she has in the anime "The Princess of Hoenn."
- Hikari's birthday gift to her in the Alea Iacta Est story "A Little Princess" is her Arabian-styled outfit from the Wallace Cup.
- The fact that she has fire magic is a nod to her starter Pokémon, Torchic.
- Her D-Wheel in the Alea Iacta Est story "Before the Storm" is a butterfly (named Black Swallowtail) as a reference to her Beautifly.
Oblivious to Love: Has no idea that Kanata is crushing over her.
Playing with Fire: Her magic circle is fire based.
Red Baron: "The Princess of Prophecy" and "Fortune Fatale".
Ship Tease: A huge amount in the Alea Iacta Est story "Before the Storm" has her become close with Yugo, to the point that she confesses her love for him and kisses him in front of a live audience. Unfortunately, it seems as if fate wants Yugo to be with Yuri...
Signature Move: High Priestess of Prophecy is said to be her trademark monster. It's commented in some stories that she looks similar to High Priestess.
Significant Birth Date: Going by the Alea Iacta Est story "A Little Princess", she seems to be born in March: her Craft has aquamarine gems (which is March's birthstone) and the flowers decorating her Magic Seal and skateboard are presumably daffodils (the flower for March).
Tarot Motifs: She reads Tarot cards and has a Prophecy Deck. Her birthday in the "A Little Princess" story of Alea Iacta Est has her dressed as the High Priestess.
Third-Person Person: As Fortune Fatale.
Yaoi Fangirl: Is into boy's love (especially if it regards Team Satisfaction) and making fun of that is one way to get your ass beaten in a duel.

Masato Sakurada

"Let the storm rage on!"

Haruka's little brother who uses ice magic and loves singing. Uses an Ice Barrier deck.

Adaptational Nice Guy: Masato in the anime seemed to be like the Insufferable Genius type. Here, he's much more enthusiastic and lively.
Age Lift: Around six to seven in the anime, upgraded to nine in the stories.
An Ice Person/Making a Splash: Wields an Ice Barrier deck (which is Water attribute) and uses ice magic.
Beware the Nice Ones: Upon hearing how Crow killed himself in In Somnis Veritas, he decides to express his feelings in the most elegant way possible...by pinning Crow with icicles and stabbing one into his chest over and over again.
Dogged Nice Guy: To Mieru in Nobis Vivus Manes.
Fire/Water Juxtaposition: To his sister, who has fire based magic while he uses ice.
Foil: To Mokuba. They're the male duelists in their groups with contrasting personalities (Masato's energetic to Mokuba's near-stoic and sarcastic one) and the elements of their decks (Ice/Water to Burning Abyss/Fire)
Grade Skipper: Skipped kindergarten and is currently in the 5th grade at the age of nine.
Keet: Really energetic about everything. He likes singing, makes puns and is enthusiastic as they go.
Real Men Wear Pink: Considering where his Battle Cry comes from, this is a given.
The One Guy: Of the rescue team in In Somnis Veritas.
Tarot Motifs: The Magician, being resourceful, wise and determined.
Telepathy: Shares a mental link with his sister, as revealed in In Somnis Veritas.

Kanata Sakamoto

"Gong Yi Tampai!"

A plucky girl who works at the "Café in Wonderland" along with her older sister, Millefeui. Uses a Zoodiac deck.

Adaptation Expansion: Seeing as she only appeared in two episodes, she gets more characterization here. She's outgoing, plucky and has feelings for Haruka too.
Cute Bruiser: She's an adorable girl who wields the powerful Zoodiac deck.
Dishing Out Dirt: Her Zoodiac monsters are all of the Earth attribute.
Fangirl: Her introductory narration in In Somnis Veritas states that she's a fan of Vivian Wong.
Happily Adopted: By Hanako, alongside Millefeui. The Alea Iacat Est story "A Little Princess" reveals that it was originally going to be Millefeui alone, but Hanako also adopted Kanata due to their closeness.
Meaningful Name: Kanata comes from the phrase Haruka kanata, translated as "Faraway". Millefeui explains that Kanata named herself because, back when the two were orphans, the dreams of being adopted and having a home and loving parents were nothing more than faraway dreams.
Mythology Gag: It's subtle, but the most powerful Zoodiac monster is Zoodiac Boarbow, which is a nod to how Kanata's signature Pokémon is Grunpig.
The Nicknamer: Nicknames her Zoodiac cards in In Somnis Veritas after learning that they can talk.
Plucky Girl: She's lively, energetic and determined against all odds.
Tomboy and Girly Girl: The tomboy both to her sister and Haruka.
Unexpected Character: She only appeared in two episodes in the anime, but she's one of the main characters in this universe!

Millefeui Sakamoto

"Woman up!"

The older sister of Kanata who works at the "Café in Wonderland" and the girlfriend of Serena. Wields a Madolche Deck.

Her Alea Iacta Est story is "A Little Princess".

Adaptational Nice Guy: She's definitely sweeter here than in the anime (where she's more of a Friendly Rival with Serena).
Berserk Button: Hates being called a cake-sniffing orphan.
Beware the Nice Ones: Sweet, girly and motherly normally...but when you piss her off, then she gives you no mercy. if Nobus Vivus Manes is to go by, she dueled JACK ATLAS in Wonderland and come out on top.
Feminine Women Can Cook: Works at the Café in Wonderland and notes that she had to help Hikari cook a dish for Shinji's birthday in the Alea Iacta Est story "Nightmare Troubadour". This also extends to her Madolche deck.
Girly Bruiser: Duels people with monsters based on dolls and desserts and she also sews clothes for dolls.
Dishing Out Dirt: Her Madolche monsters are all Earth-attribute.
Happily Adopted: By Hanako, along with Kanata.
It Was a Gift: Her current deck was given to her by Serena and she treasures it very much.
Lipstick Lesbian: Is the girly one and has a relationship with Serena.
Motif: Dolls. She sews dolls for Haruka and Mieru and Nobus Vivus Manes has her dressed as Ghostrick Doll.
Mythology Gag: Her Madolche deck is based on desserts, and in the Pokémon anime she had a Swirlix (later Slurpuff) which is essentially a dessert-type Pokémon. Her cooking skills also are a reference to her debut and her skill in making Poképuffs.
Textile Work Is Feminine: While in the orphanage, she sewed and mended clothes for dolls, and she's the one who makes the Team Satisfaction Cloth Dolls for Haruka's birthday and Cloth Yuya for Mieru's.
Tomboy and Girly Girl: The girly girl to both her sister and girlfriend.
Unstoppable Rage: Has this in the Alea Iacta Est story, "A Little Princess". Then again, you would too if someone has taken the souls of those who loved and is just a hair's breath away from keeping them forever.

Hikari Hitagi

"Let's light it up!"

A student who runs a news article at school known as Light the Night in regards to strange and supernatural situations in Domino. Alea Iacta Est later has her begin a online dueling blog called "Dawn of the Duel". Wields a Melodious Deck.

Her Alea Iacta Est story is "So Weird".

Adaptation Personality Change: Hikari is shown to be sarcastic and has a rivalry with Serena compared to her kind and sweet personality in the anime, but she's not a complete bitch.
Alliterative Name: Hikari Hitagi.
Berserk Button: Dislikes Chasing Shadows (because she got rejected by them) and anything involving the Crimson Signers (due to a Freudian Excuse).
Cosplay Otaku Girl: Likes dressing up in different outfits based on fictional characters: she dresses as Ruby Gloom and Rarity in Alea Iacta Est and Marinette in ''In Somnis Veritas.
Everyone Has Standards: While Hikari and Serena don't see eye to eye, Hikari will never suggest someone to just go and disappear completely and never be found, seeing as this is what happened to Shinji's brother.
Expy: Presumably of Yuzu Hitagi, considering she has Yuzu's last name and all.
Fangirl: Of Miraculous Ladybug, with the narration of In Somnis Veritas stating how she plans on making a cosplay of Rena Rouge.
Light 'em Up: She uses Melodious monsters, which are all of the Light Attribute.
- Light Is Good: Despite her haughty attitude, she's one of the good guys.
Nice Girl: Her haughty personality aside, one has to be to take in Shinji as a foster child.
Magic Music: She has the ability to do this as she reveals in her Alea Iacta Est story "So Weird" and wields Melodious Monsters.
The Rival: To Serena, where they trade sarcastic barbs at one another.
Ship Tease: With Shiji.
Start My Own: After her article was rejected by Chasing Shadows (the premier website for anything and everything strange in Domino), she decides to form her own online dueling blog, "Dawn of the Duel".
Why Did It Have to Be Snakes?: The Alea Iacta Est story "Nightmare Troubadour" states that she hates living haunted houses after she watched Monster House.

Shinji Shimabara

"Gem-Knights, standby for battle!"

A quiet near-emotionless boy who is trying to find the whereabouts of his older brother, currently staying with Hikari and her mother as a foster child. He uses a Gem-Knight deck.

Adaptational Nice Guy: Isn't shown to be a jerk at all, but more closed-off and even has a softer side.
Alliterative Name: Shinji Shimabara.
Animal Motif: Rabbits. His most treasured card is "Bunilla" and he takes care of the rabbits at school.
Berserk Button: Does not like Pendulum Monsters as revealed in Legend of the Three Caballeros: Dark Signs of the Sun as it was those very cards that caused his brother's death.
Break the Cutie: Breaks hard upon reuniting with his brother in In Somnis Veritas, especially upon hearing that Reiji was killed.
Freudian Excuse:
- His aloof and cold personality comes from the disappearance of his older brother.
- Doesn't like Pendulum Monsters because his brother's use of them caused his downfall, as shown in Legend of the Three Caballeros: Dark Signs of the Sun when Panchito reveals them.
Happily Adopted: Or rather "happily accepted as a foster child" by Hikari and her mother.
Hidden Depths: Alea Iacta Est states that he takes care of the school's rabbits and that he's a really good artist.
Real Men Can Cook: Tries to cook pancakes and a tuna melt for Hikari in In Somnis Veritas.
Real Men Wear Pink: He sketches and has a fondness for rabbits. In fact, his most treasured card is "Bunilla".
Ship Tease: Has some of this with Hikari, who is one of the only people who can get him to open up. He kisses her at the end of the Alea Iacta Est story "So Weird" to confirm it.
The Stoic: Usually doesn't show a lot of emotions on him, which stems from him closing off from others after his brother disappeared one night.

Mokuba Kaiba

"This party's about to get crazy...let's rock!"

Younger brother of Seto Kaiba, mostly known to be slightly stoic and sarcastic. Uses a Burning Abyss deck.

Adaptation Personality Change: Unlike his nicer personality in the anime, he's slightly colder and distant.
Dark Is Not Evil: Wields a Burning Abyss deck and is shown to be nice, a bit snarky though.
Damsel in Distress: Gets caught by Noah in In Somnis Veritas, thus kickstarting the plot. Bonus points: he's also dressed as a girl because of it.
Deal with the Devil: Whatever he asked Malacoda, Netherlord of the Burning Abyss for. Bonus points: he uses the Burning Abyss deck, with most of the monsters being demons. Ab Initio states this happened when he and Seto were raised by Gozaburo.
Wholesome Crossdresser: In In Somnis Veritas, he is stuck dressed as Alice Liddell due to him being in a production of Alice in Wonderland and his old clothes are too dirty to use.

Seto Kaiba

"Let's make this showy, shall we?"

CEO of Kaiba Corp. by day, but moonlights as the mysterious Henshin Hero Kaibaman. Seems to keep tabs on the strange things that goes about in Domino City.
Appears in Legend of the Three Caballeros: Dark Signs of the Sun, where he warns the Caballeros about their role in saving multiple worlds from the Dark Signers of another world.

Adaptational Heroism: Definitely. You don't expect the Kaiba from the show to go out acting as a Kamen Rider figure, do you?
Character Tics: Placing a hand over his left eye.
Does Not Like Guns: Shooti's exposition of him in Lux ex Tenebris states that Kaibaman can summon various weapons out of light, but never fires guns.
Famed In-Story: His heroics as Kaibaman are well known in Domino City, documented in Chasing Shadows.
Fanboy: He's a huge Kamen Rider fan. According to Carly, he's into the Showa-era Kamen Riders.
Gondor Calls for Aid: Requests the help of Serena and her friends in In Somnis Veritas to help free Mokuba and anyone else lost in Wonderland after Leon is captured.
Light Is Good: Uses the Blue-Eyes White Dragon cards (of course) and is shown to be more heroic here than in his main canon.
Magic Eye: His left eye is a blue-white color that grants him his illusion powers.
Master of Illusion: His left eye can somehow project various images from replicating a memory to unleashing a variety of weapons.
Mundane Utility: According to In Somnis Veritas, he practices magic but more for practical uses like helping him sleep better at night.
Odd Friendship: With Natsume, despite her being a Dark Signer and everything. In Somnis Veritas has her chilling out in his office while he does research and she constantly teases him in regards to asking Jounochi out on a date or the like.
Official Couple: He's in a relationship with Jounochi in Ab Initio.
Shock and Awe: Is capable of using electric attacks.

The Hopkins

A family of five siblings who move to Domino in Between My Brother and Me: Ab Antiquo, each of them being a powerful duelist in their own right.

Tropes associated with them:

Badass Family: All of them are powerful duelists.
Happily Adopted: Raphael, Varon, Amelda and Miruko. If you count Rebecca raised by her grandfather, then all five of them are.

Rebecca

"Let's hit the climax!"

The only girl of the Hopkins family and a powerful duelist to be reckoned with who gets involved with Domino's craziness when she and her brothers move to Domino City. Wields an Artifact deck.

Adaptation Personality Change: Isn't so clingy on Yugi at all and she's interested in weaponry.
Cute Bruiser: Really cute and wields a powerful Artifact deck.
Gamer Girl: Introduced in Ab Antiquo playing "The World" and Arthur asks Raphael to ensure she doesn't spend too much time online.
Light 'em Up: Her Artifact Deck is of the Light attribute.
- Light Is Good: She's a really sweet girl who is ready to take on all challengers.
Red Baron: "Artifact Maiden".
Yaoi Fangirl: Admits that she loves boy/boy love and finds it to be absolutely adorable.

Miruko

"Beware...take care...because the freaks come out at night!"

Younger brother of Amelda who is also part-vampire. Fittingly, he wields a deck based on these creatures of the night.

Adaptational Jerkass: From what was seen in the anime, he was essentially like Mokuba. Here, he's a bit of a jerk towards Noah in regards to Noah's Wonderland deck and makes some insensitive remarks (not that he's aware of that) in regards to Noah's gullibility.
Dark Is Not Evil: Wields a Vampire deck and he himself is a vampire, but he's shown to be sweet and friendly...except when it comes to Noah.
Deadpan Snarker: Likes to quip throughout his duel with Noah in Ab Antiquo as to why Noah would use something as crazy as a Wonderland deck.
Dhampyr: Admits he is half-vampire.
Foil: Admits in his introductory narration in Ab Antiquo that he and Rebecca are complete opposites.

Varon

"Let's fight this man-to-man!"

A boisterous fighter who helped shelter Amelda and Miruko during a terrible war and ended up traveling with them before the three were adopted by Rebecca and her grandfather. Wields a Constellar deck.

Dhampyr: Just like Miruko and Amelda.
Fanboy: Of Kamen Rider, and he and Shooti briefly share their comments on the ones they like.
Light 'em Up: His Constellar monsters are of the Light attribute.
- Light Is Good: Despite being part-vampire, he counts due to his Constellars being Light Attribute.
Official Couple: With Amelda, which could border on incest since he is Rebecca's older brother in a sense.
Star Power: Uses a Constellar deck.

Amelda

"So then...play with me?"

Older brother of Miruko who ended up becoming a vampire after accidentally entering a mausoleum. Wields a Gimmick Puppet deck.

Act of True Love: Him biting Varon and draining him of his blood and asking Varon to feed from him in return to become a dhamphyr is considered this by Miruko.
Bizarre Taste in Food: Ab Antiquo has him dipping French fries into a vanilla milkshake and eating them.
Creepy Doll/Perverse Puppet: His Gimmick Puppet deck.
Creepy Good/Dark Is Not Evil: Is part vampire, dresses in black, and uses the creepy Gimmick Puppet deck. But he's on the side of good.
Dhampyr: Once again. However, Miruko states that he has more vampire traits because he was the first one to be turned.
Official Couple: With Varon.

Raphael

Eldest of the Hopkins and was adopted after losing his entire family in a shipwreck. Very protective of his little sister.

Adaptational Nice Guy: He was an Anti-Villain at best in the anime, but he's an all around good guy this time around.
Big Brother Instinct: As he notes in his introductory narration, he's fine if he's attacked. But Rebecca? Then the attackers answer to him.
Gentle Giant: A broad man who towers over practically everyone else. Also a sweet guy.
Huge Guy, Tiny Girl: The huge guy to his little sister's tiny girl. Also in Ab Initio he encounters the tinier Eureka.

Dark Signers

A group of seven individuals who died and became resurrected by the Earthbound Immortals. Each Dark Signer is represented by a certain sin.

Adaptational Heroism: In their original series, they were all after the Crimson Signers for one reason or another (three of them were, at best, on the side of Anti-Villain.) Here, they're not antagonistic at all, although they do have some ulterior motives.
- Ambiguously Evil: Just because they aren't as monstrous as the original Dark Signers doesn't mean they're 100% good guys.
Dark Is Not Evil: They may be undead beings tied to Earthbound Immortals, but they're not evil...yet.
The Dreaded: In Lux ex Tenebris, Carly notes that those who chase after them end up dead.
Seven Deadly Sins: Each Dark Signer falls under a certain sin and feed on souls who indulge in that sin. From highest sin to lowest, this is Wataru (Pride), Nagi (Envy), Kamitsure (Wrath), Korni (Sloth/Despair), Bel (Greed), Mikuri (Glutton) and Natsume (Lust)
Villains Out Shopping: They have jobs when they're not being, well Dark Signers. Kamitsure, for example, works as a DJ and Nagi works as a model.

Kamitsure

The Dark Signer of the Spider. She works as a DJ and acts as a motherly figure to her Acolyte, Molly.

Adaptational Job Change: Works as a DJ in this universe.
Combat Stilettos: She wears heels and even ''weaponizes' them as shivs when pissed off.
Official Couple: With Korni.
Mama Bear: If you know what is good for you, do not, I repeat, do not put Molly in danger or you will face the wrath of a stiletto into your eye.
Mythology Gag: She's the Dark Signer of the Spider and in the games, one of the Pokémon she uses is a Joltik.
Team Mom: She absolutely dotes on Molly and doesn't bat an eyelid on the idea of Molly having an Imaginary Friend in "Mr. Spooky."

Bel Amsel

The Dark Signer of the Hummingbird and the youngest member of the seven. Uses a Fortune Lady Deck. Is part of the focus of Lux ex Tenebris alongside Shooti (who is her Dark Signer Acolyte).

Abusive Parents: Her father was a drunkard who forbade her from going out, and called the cops to get her back when she went to a performance art show. Kamitsure comments that he was filled with so much anger that he almost died when she "fed" on him.
Adaptational Jerkass: She was sweet, clumsy and very zealous in the games and anime. Here, there's no sign of clumsiness and she's shown to be more irritable, the sweetness is usually a facade and she is much more sinister underneath the surface.
Been There, Shaped History: In Lux ex Tenebris, she reveals that she was the one who put Ushio in the Shadow Game that would bring Yugi, Jounochi and Honda together.
Birds of a Feather: Likes the color orange (like Shooti) and has a love for an old sci-fi film (Metropolis whereas Shooti loves Blade Runner)
Color Motif: Orange and green, mirroring Shooti.
Cute Bookworm: She loves reading The Egypt Game and gets angry when Shooti insults Zilpha Keatley Snyder's name (No, seriously. That's her real name.)
Dark and Troubled Past: Her father was an abusive drunk who threatened to call the cops on her when she was on stage for a performing art show, and ended up dead fleeing from him and run over by a car.
Look Both Ways: She died being run-over by a car while trying to escape her father.
Meaningful Name: Her last name is German for "Blackbird" which is what her Earthbound Immortal is.
- Ironic Name: Her first name means "White", but she's a Dark Signer.
Older Than They Look: While this technically applies to all Dark Signers, she is the most notable one since she looks to be around 12 years old.
Purely Aesthetic Glasses: Wears glasses despite having perfect eyesight as a Dark Signer.
Ship Tease: With Shooti.

Korni

The Dark Signer of the Monkey, who is shown to be very energetic and lively despite her undead status. Her Dark Signer Acolyte is Jun.

Blithe Spirit: In a way; she feeds off the despair and Sloth in a person's soul to perk everyone up.
Cooldown Hug: She has a job where she goes to people's apartments and hugs them for an hour. She gives one of these to Shooti both to comfort him and feed on his despair.
Courier: She makes deliveries as a living.
Friend to All Children: In the Alea Iacta Est story "Night at the Museum", she encourages kids to go to her so she can hug them all.
Gamer Girl: She plays Life Is Strange and knows about Saya no Uta when Shooti mentions the latter.
Genki Girl: Energetic and lively despite, you know, being dead and all.
Hair of Gold, Heart of Gold: She's a blond haired sweetie who wants to liven everyone up.
Never Heard That One Before: Sarcastically laughs when Shooti assumes she listens to Coldplay. Because she's the Dark Signer of the yellow-based Earthbound Immortal and Coldplay has a song called "Yellow".
Official Couple: With Kamitsure.
Rollerblade Good: Just like in the games, she's shown having a pair of roller skates.
Tomboy and Girly Girl: The Tomboy to Kamitsure's girly girl.

Nagi

The Dark Signer of the Lizard, usually calm and graceful despite all circumstances.

Adaptational Job Change: A pilot in the games, now a fashion model in the stories.
Adaptation Personality Change: She acts more like a seductress in the stories.
Amicable Exes: With Mikuri.
Berserk Button: Does not like it when people assume she uses Harpie Lady cards.
Blow You Away: She states that she uses a Gusto deck.
Even the Girls Want Her: In Somnis Veritas states that her looks have made her able to charm "most men and some women."
Hidden Depths: Apparently likes to stand at the balcony with Airplane Arms and shout "I'm queen of the world!" when no one's looking.
Lady of War: She's a model who has won various tournaments with a Gusto Deck.
Ms. Fanservice: The narrations describing her in Lux ex Tenebris point her out as this, and Shooti just momentarily stares at her when they first meet.
Mythology Gag: Dated Mikuri for a while but it didn't pan out, just like in the manga.
Official Couple: With Natsume.

Natsume

The Dark Signer of the Giant. She is a powerful psychic who has a job as an actor and a grudge against the Arcadia Movement. Noah is her Dark Signer Acolyte.

Berserk Button: Hates anything to do with Divine and the Arcadia Movement as it resulted in her becoming a Dark Signer.
Composite Character: Has the motherly side of her from Electric Tale of Pikachu and her Black 2/White 2 job as a movie star.
Mundane Utility: Shooti notes that her psychic powers made it easy to make the special effects for her movies in Lux ex Tenebris.
Odd Friendship: Hangs out with Kaiba even though they are from two very different worlds.
Official Couple: With Nagi.
Psychic Powers: From what we know of her in this world, she is shown to have Touch Telepathy and premonitions, and helped in creating the Arcadia Movement.
The Tease: In a non-platonic sample, she's this to Seto Kaiba who constantly pesters him on when he's going to confess his love for Katsuya Jounochi.

Mikuri

The Dark Signer of the Whale who works as a fashion model. He's also the Prince of Atlantis and his father is the creator of Chasing Shadows.

Adaptational Sexuality: He's confirmed as bisexual in the stories.
Atlantis: He hails from this.
Amicable Exes: With Nagi.
May–December Romance: With Nagi, since he's from Atlantis and is (presumably) thousands of years old.
Motifs: His room has an underwater feel to them, fitting the Earthbound Immortal bonded to him.
Irony: He feeds on the sin of Gluttony, but he's thin as a rail.
Mythology Gag: He's the Dark Signer of the Whale and he uses a Wailord in his party in Pokémon Emerald and the Delta Episode for Omega Ruby and Alphla Sapphire.
- Had a relationship with Nagi that didn't pan well, just like in the manga.
Really 700 Years Old: He's from Atlantis which means he's the oldest member of the Dark Signers.
Single Tear: Sheds one when he reminisces of his love affair with Daigo.
Star-Crossed Lovers: With Daigo Tsuwabuki, again.
Warrior Prince: The prince of Atlantis and also a Dark Signer.

Wataru

The Dark Signer of the Condor and leader of the Dark Signers.

Badass Bookworm: His room in the Dark Signer Sanctuary is a library, and he's the leader of the group.
Purple Is Powerful: His color is purple and he is the leader of the Dark Signers themselves.
Troll: Moves the interior of the room around as Shooti leaves, making him fall into a wardrobe. And before that, he riles the boy up on whether or not he's The Everyman type of guy.

Dark Signer Acolytes

Those who have been revived by the Dark Signers are the Acolytes, who work as apprentices of their respective Dark Signers and are their replacements if anything happens. They are noted by the cloaks that bear the symbol of the Dark Signer who resurrected them.

Kill the Cutie: All of them died in pretty gruesome ways.
Passing the Torch: They are to inherit the roles of Dark Signers after their predecessors pass on.

Molly Hale

The youngest of the Dark Signer Acolytes, she is a very cheerful girl despite her undead status. She is the Dark Signer Acolyte of the Spider and has used both a Dark World and a Doll Part deck.

Her Alea Iacta Est story is "Night at the Museum".

Cheerful Child: Even though she's an undead girl, she's barely seen without a smile on her face.
Creepy Doll: Uses a Doll Parts deck when she duels in Ab Antiquo.
The Cutie: She's so cute and doted on by her fellow Acolytes. Unfortunately...
- Kill the Cutie: She was killed by Doll Chimera hurling her out of the attic of her own home.
Dub Name Change: She uses her dub name instead of her original one ("Me").
Everyone's Baby Sister: To the Dark Signers and the Acolytes. Hurting her is the equivalent of a death sentence.
Flower Motifs: Her Dark Signer cloak is embroidered with spider-lilies, which are flowers that represent Death in Japanese culture. Her nickname "Little Lycoris" comes from the scientific name of the spider-lily.
Foil: To Rebecca. Both are the little sisters of their group, the only girl of their group and shown to like Alice in Wonderland. Molly is an undead girl who uses DARK Spellcaster-type monsters in her Doll Part cards, while Rebecca is alive and uses the LIGHT Fairy-type Artifact monsters.
Imaginary Friend: Has one known as "Mr. Spooky" in In Somnis Veritas...Maybe; Reiji theorizes that Mr. Spooky is probably real (he is as confirmed in Alea Iacta Est).
Inseries Nickname: "Little Lycoris".
Intergenerational Friendship: With Marik/"Mr. Spooky" who is about 3000 years old, while Molly is only 5. She befriends him so quickly that she even gives him her Dark World deck so he wouldn't be lonely.
Lonely Doll Girl: With her dad off to work, she became friends with a doll named Alice. And then, that doll decided to kill her...
Magic Skirt: When she's shown upside-down on the ceiling in Lux ex Tenebris, the narration notes that her skirt isn't flying up onto her face.
Nightmare Fetishist: In Alea Iacta Est, she duels with a Dark World deck while Ab Antiquo has her use a Doll Part deck instead.
- In her Alea Iacta Est story, "Night at the Museum", she thinks that a mummy looks like a "crying baby" and created the decorations for her school's Halloween party that involves friendly giant spiders.
Puppy-Dog Eyes: She uses this frequently in her Alea Iacta Est story with varying results.
Running Gag: Having trouble pronouncing words. Justified as she's only five.

Shooti Hayami

"Roll of thunder, here my cry!"

A photography loving boy who is the Dark Signer Acolyte to Bel. He wields a Batteryman deck. He is also the protagonist of Lux ex Tenebris as he interacts with the Dark Signers while trying to uncover the disappearance of his older brother.

Adaptation Personality Change: In the anime, he was aloof, stoic and preferred to be alone. In the stories, he's shown to be adorable, has a close friendship with Jun and has romantic feelings for Bel.
- In the anime, his camera was only used to take photographs of the mistakes he made in battle. Here Shooti just takes photos because they look good.
Berserk Button: Does not like being called an everyman type of character as he explains to Wataru.
Break the Cutie: Breaks hard upon learning about his friend's death in Lux ex Tenebris and it gets worse from there.
Camera Fiend: Loves photography, taking photos wherever he goes.
Character Tics: Placing his arms in front of himself whenever he starts fanboying about something.
Childhood Friends: With Jun.
Everybody Hates Mathematics: Dislikes math, which is brought up in Lux ex Tenebris.
Fanboy: Likes Kamen Rider, Blade Runner and even Life is Strange.
Harmful to Minors: He's seen Kiryu dragged off to hell, learns his best friend is dead (after learning that he's jumped into an oncoming train), the girl he likes is a Dark Signer, watches as Yusei slices his throat and is the only one at his school that knows about the Dark Signers' plans to unleash the Gates of Hamunaptra. And that's in the span of three chapters.
Hidden Depths: Be honest, how many kids his age would make a reference to Death in Venice?
Iconic Item: His trademark teal digicam, to the point where letting Bel borrow it is like giving up his soul.
The Movie Buff: Likes movies, like the aforementioned Blade Runner, and quotes various lines from said movie. He's also knowledgeable about other films.
Real Men Can Cook: He cooks his own lunches as revealed in Lux ex Tenebris since his mother works late nights at the hospital.
Real Men Wear Pink: He's a huge fan of Natsume's "Mystic Door to the Magical Land" movies and loves Life is Strange.
Related in the Adaptation: Is the younger brother of Shuta Hayami in this series.
Sensitive Guy and Manly Man: The Sensitive Guy to Jun's Manly Man.
Ship Tease: With Bel, showcased throughout Lux ex Tenebris.
Stereotype Flip: While he is shown to know a lot of pop-culture and literature, he struggles with school work, with math being his least favorite subject.
Tagalong Reporter: With Carly Nagisa in Lux ex Tenebris.
Tannhäuser Gate: States that he wants this card (Despite that it doesn't work with his deck). He gets it in the end after Amelda wins it from Jun and he hands it off in Ab Antiquo.
Yaoi Fangirl: Gender-flipped; he does like male/male pairings but the scenarios never delve into the two having sex.
Your Favorite: His mother's beef stew, as revealed in Lux ex Tenebris.

Jun

"I, Jun, will knock you all down!"

An energetic boy who crashes head first into danger and the Acolyte to Korni. He wields a Six Samurai deck.

Animal Motifs: Has a monkey-like grin and is as energetic as one. Fittingly, he's the Acolyte to the Dark Signer of the monkey.
Childhood Friends: With Shooti.
Cruel and Unusual Death: Was killed by Mr. Armstrong choking him to death after a duel with his father.
Dead All Along: He was dead prior to the start of Lux ex Tenebris, revived as a Dark Signer Acolyte
Keet: Very energetic and Shooti notes that the energy is what caused Jun to get into track and field.
Make It Look Like an Accident: His death by Armstrong was perceived this way; thankfully Korni was able to save him.
Samurai: He uses a Six Samurai deck.
Sensitive Guy and Manly Man: The Manly Man to Shooti's Sensitive Guy.

Rui

"Are you ready to repent?"

A teenage girl with the uncanny ability to see auras and the Acolyte of Nagi. She is one of the protagonists of Do ut Des alongsides Wes. She uses a Salvation Seraphim Deck.

Adaptational Badass: She never fought in her original game, but she's a duelist here with incredible skill. How incredible? Her first duel was against Yuri and she absolutely destroyed him. The only thing preventing her from winning is Wes snapping her out of her senses.
Aura Vision: Just like in the game, she's able to see the darkness in people. This is now upgraded in that she can see the sin in people's souls too.
Better to Die than Be Killed: She tells Wes that she rather die than let herself be kidnapped by Academia to be raped or tortured.
Brooding Boy, Gentle Girl: The gentle girl to Wes's brooding boy.
Character Narrator: Of Do ut Des.
Character Tics: She likes to trace a finger over the crescent moon choker around her neck.
Cute Bookworm: She loves reading fairy tales and worked with a book collector in the past.
Incorruptible Pure Pureness: She describes herself as this, but she's worried about how long that will last.
In-Series Nickname: She's constantly nicknamed as "Princess".
Lady and Knight: The Bright Lady to Wes's Dark Knight.
My God, What Have I Done?: Looks in utter horror at how she nearly killed Yuri in their duel, and notes that there is no way that she can explain to Elaine that someone like her injured him.
Our Angels Are Different: Subverted; her Salvation Seraphim deck has depictions of angels that are common in popular culture. Earthbound Disciple Geo Cherubim, however, is described as a metallic statue with a mask containing seven spokes and a flaming sword.
Sweet Tooth: She loves sweets and her favorite fairy tale is Hansel and Gretel.
Yin-Yang Bomb: The Salvation Seraphim monsters are both Dark and Light attribute.

Noah Nagisa (formerly Noah Kaiba)

The son of Gozaburo Kaiba who was resurrected as an Acolyte of Natsume. Wields a Wonderland deck and is the focus of In Somnis Veritas.

Alice Allusion: His deck is based on Alice in Wonderland and he makes plenty of quotes in regards to the story. In Somnis Veritas has him ruling Wonderland for some odd reason.
Alliterative Name: Noah Nagisa.
Big Bad: Of In Somnis Veritas, seeing as he's the one who is keeping souls in Wonderland and brainwashed Mokuba to be his Alice.
Berserk Button: Hates Miruko constantly asking him about his past or his Wonderland deck in Ab Antiquo.
Casting a Shadow: His Wonderland monsters are all Dark-types, which makes duelists he use it on question why they would be such a thing.
Cheshire Cat Grin: Usually shown wearing this when he's in a teasing mood.
Mysterious Past: He doesn't want to reveal his past at all and is annoyed when Miruko constantly presses him about it, to the point the other Acolytes look in fear whenever Miruko is Innocently Insensitive (Which is all the time). This probably has something to do with the events of In Somnis Veritas.
No Sense of Personal Space: Gets way to close to Mokuba's bubble in In Somnis Veritas, not helping that Mokuba is dressed like Alice at the time.

Wes

"Let's go for a ride!"

A former member of Team Snagem and Acolyte to Mikuri. He's one of the two protagonists of Do ut Des alongside Ruri. He uses a PSY-Frame deck in normal duels and a Synthphonist deck as a Dark Signer.

Amazon Brigade: All of his Synthphonist monsters are girls.
Adaptational Angst Upgrade: Lost his parents in an explosion and blames himself for not being strong enough to save Rui from death.
Adaptational Badass: He was already a badass in his game, but now he's also a psychic duelist.
Adaptation Personality Change: Justified since there's not a lot you can do with a Silent Protagonist; he's much more cocky when it comes to duels and holds a lot of emotional baggage when it comes to people he's close to. He's also shown to be suspicious of the Dark Signers.
Artificial Limbs: His Synthphonist monsters all have prosthetic arms and legs, reflecting how he has the Snagem machine strapped to his left arm.
Badass Biker: Just like in the game. His first duel is a Turbo Duel against an Academia soldier.
Blow You Away: His Synthphonist monsters are of the Wind attribute.
Brooding Boy, Gentle Girl: The brooding angsty guilt-riden boy to Rui's sweet and pure gentle girl.
Cool Bike: Has a bike that looks like a black rabbit. After it gets destroyed, and learning how he is part of Zarc, he transforms it into one of a dragon.
Flipping the Bird: Delivers this to Team Snagem before exploding their hideout.
Hidden Depths: His biggest dream is to swim in the ocean and sink into it. He also has a thing for circuses and carnivals.
Knight in Shining Armor: Just like in the game, Rui calls him a knight.
Lady and Knight: The Dark Knight to Rui's Bright Lady; ironically, his monsters are of the LIGHT attribute.
Large Ham: Very dramatic and bombastic in his duels, compared to his stoic and straight-lased personality in the games.
Light 'em Up: His PSY-Frame monsters are of the Light attribute.
No Good Deed Goes Unpunished: Decides to be the knight who saves Rui, but ends up with the two falling in a sinkhole, both of the dead and then resurrected as Acolytes.
Psychic Powers: Can levitate objects, read minds and see what cards a duelist holds in their hand. He also uses a PSY-Frame deck, which are all Psychic monsters.
Real Men Wear Pink: He likes magical girl anime, something that he's embarrassed to admit to Rui and his Synthphonist deck is all about cute robotic girls. His bike is described as a black rabbit with yellow ring (which describes an Umbreon, one of the Pokémon he starts with).
Reincarnation: He's revealed to be a part of Zarc's soul reborn in the third chapter of Do ut Des. Those who know their Yu-Gi-Oh! know that this is a bad thing.
Survivor's Guilt: Blames himself for running away to join a circus as it meant he ended up surviving an explosion that killed his parents in his house.
Telepathy: Is able to communicate with Rui like this...which startles him because he has no idea how that is possible.

Reiji Shimabara

The eldest member of the Acolytes, and Acolyte to Wataru, acting like the father of the five. He is also Shinji's older brother.

The Ace: Was an expert duelist, according to Shooti, who was so powerful that even Haruka would turn tail and leave.
- Broken Ace: After his death, he's absolutely empty and hollow inside.
Adaptational Jerkass: Just like his brother's done a complete 180, so has he. In Somnis Veritas takes the cake when he forcibly takes his brother's precious Bunilla card (which was on Reiji when he died) and offers it to Wenet in order to gain Crow's memories all while acting like a complete dick about it.
- This is also shown in Lux ex Tenebris where he cheerfully asks Shooti how his brother is doing. Shooti's thoughts?
"That insensitive prick."
Break the Haughty: Was a powerful duelist that made other duelists run away in fear. But this attitude lead to his death and resurrection as a Dark Signer Acolyte after he foolishly went alone to challenge Seto Kaiba and was ambushed.
Deal with the Devil: He made a contract to obtain the D/D and D/D/D cards, but he no longer has them after his death.
The Dreaded: He was so skilled of a duelist that even Haruka, Princess of Prophecy, wouldn't want to duel him.
My Greatest Failure: Seems to have some sadness in regards to dying. It's revealed in Lux ex Tenebris that he received a call to a challenge from Seto Kaiba at Domino Below, only to learn too late that it was a trap and it ended with his dead body dangling on a noose.
Purple Is Powerful: He has purple hair and he's the Acolyte to Wataru, Dark Signer of the Raptor. He was also a very powerful duelist in his day.
Red Baron: "The Boy Who Signed the Dark Contract".
Stepford Smiler: His smile is described as being "empty as an abandoned well".
Team Dad: The eldest member and the one who keeps an eye on everyone else.

Team Satisfaction

A group of duelists in Domino Below who help enforce order and run a bar, Satisfaction Town, on the side. They are reincarnations to the elite guards of the Dark King of the Afterlife, and work alongside the Dark Signers in preparing Domino Below to become the "Gates of Hamunaptra".

Back from the Dead: All of them died and were reborn as the "Enforcers of Hamunaptra".
Came Back Wrong: Unlike the Dark Signers, who are shown to be human in personality, they seem to be devoid of emotions.
Youkai: In the Alea Iacta Est story "Before the Storm", they later gain appendages of different youkai: Kiryu is a nekomata, Yusei is a jorogumo, Jack is a tatsu and Crow is a karasu tengu.

Kiryu Kyosuke

The leader of Team Satisfaction and the first to fall into the darkness.

Adaptational Heroism: Doesn't go insane after his resurrection, and feels utter disgust in having to kill Yusei and dragging the rest of Team Satisfaction with him.
Dead All Along: He was unaware of being resurrected by the Dark Signers in Lux ex Tenebris until they spell it out to him.
Mind Rape: Given this by the Dark King in Lux ex Tenebris in order to get him to become a true Enforcer of Hamunaptra.
Mythology Gag: He was resurrected by Natsume, the Dark Signer of the Giant. He was the Dark Signer of the Giant in the show.
Power Tattoo: His arms are wrapped in tattoos that look like a double helix.
Shock and Awe: Has the ability to generate electricity through his arms.

Yusei Fudo

Boyfriend to Kiryu and second-in-command. His reaction to Kiryu's death and the plan for Team Satisfaction is...well, not expected.

Ax-Crazy: Becomes much more insane after resurrecting, to the point that Kiryu is uncomfortable with it.
Died in Your Arms Tonight: Dies in Kiryu's arms after slicing his throat. Also, since the name of the trope comes from a song inspired by a French phrase ("le petit mortis" aka orgasm) he dies in a...different way.
- Dies Wide Open
Laughing Mad: He of all people indulges in this after he proclaims to follow his father's footsteps in rebuilding Hamunaptra.
Mythology Gag: He's connected to Kamitsure, the Dark Signer of the Spider. Yusei has to personally duel Roman Goodwin, the Dark Signer of the Spider back in the anime.
Noodle Incident: Sometimes has to babysit Molly whenever Kamitsure comes home late; apparently the last time he let Molly stay up late, Kamitsure got so pissed off of him that she shoved the heel of her shoe up his nose when it was revealed that he let her watch Elfen Lied.
Slashed Throat: How he kills himself.
The Stoic: While he was usually a calm guy in the anime, he's more withdrawn and somewhat empty after being resurrected...on the surface.
Together in Death: Slits his throat so he can be resurrected alongside Kiryu.

Jack Atlas

Draconic Humanoid: His yokai-based appearance gives him dragon horns, claws and tail.
Feels No Pain: Can chug an entire thermos of Blue Eyes Mountain coffee without feeling anything.

Crow Hogan

Glowing Eyes of Doom: In In Somnis Veritas when he duels against Haruka.
Meaningful Name: His nickname is "The Bullet"; he kills himself with a bullet to the brain.
Mythology Gag: The fact that he's resurrected by the Dark Signers harkens to the original draft of him being the Final Boss of the Dark Signers arc.
Winged Humanoid: Obtains black feathery wings in Alea Iacta Est

Alea Iacta Est Opponets

Marcus

"Duelist beware...you're in for a scare."

A mysterious man who wields a deck of Nightmares cards inspired by Goosebumps. Appears in "Nightmare Troubadour".

Author Avatar: Not of Green Phantom Queen, but of another writer, MulitplePersonas who granted her permission to use the deck and "Marcus" being the first name of said writer.
Conspicuous Trenchcoat: Is known to be wearing a trenchcoat at all times. He's not a bad guy, just mysterious.
Dark Is Not Evil: Uses a Nightmare deck, but he's a pretty decent guy. Ironically, his monsters are of different attributes.
Hidden Depths: He's been working hard on making a Tanagram deck apparently.
The Nicknamer: Gives Serena the name of "Skate" (as she bumped into him while on roller skates) and "Lucy Dark" (Serena's favorite protagonist from the books).
Nightmare Fetishist: He states that he loved looking through horrifying books, movies and shows as a child and that is reflected through his deck.
Passing the Torch: He hands Serena his cards after she beats him in a duel.
Shout-Out: Makes copious references to the Goosebumps books, mostly via stating their titles.

Freddy

"Are you ready...for Freddy?!"

A spirit of a young boy who works at a party supplier for ghosts who crashes a Halloween party. Wields ("Borrows") a Frightfur deck. Appears in "Marionettes, Inc."

Beary Friendly: For an animatronic of Freddy Fazbear, he's quite affable.
Creepy Good: A spirit of a boy who possesses an animatronic of Freddy Fazbear, but he's only hear to liven things up at a Halloween Party.
- Dark Is Not Evil: He helps children move onto the afterlife.
Don't Fear the Reaper: One of his jobs is to help kids enter the afterlife without fear.
Only Known by Their Nickname: Insists that he be called "Freddy", due to possessing an animatronic suit of Freddy Fazbear.
Older Than He Looks: Is a young boy in bear pajamas but he's been dead for a few decades prior to the story.
Our Ghosts Are Different: He can possess an animatronic suit and wield a Duel Disk without it phasing through his arm.
Vocal Dissonance: Looks like a young boy, but speaks with a deep voice.

Midori Kusunoki

A character hailing from a gory visual novel who made a contract with a youkai in order to prove herself as the true princess against Haruka. Appears in "A Little Princess" wielding ("stealing") Mieru Hochun's Prophecy Princess deck.

Adaptational Jerkass: In her world, she's a princess (or at least she believes she's one due to her contract with the Black Tea Gentleman) but she is shown to be absolutely nasty in her story.
Green-Eyed Monster: Envious of Haruka's status as the "Princess of Prophecy".
History Repeats: She lost a duel to Haruka when Haruka activated Magic Cylinder to redirect an attack. This is the very same way that Millefeui defeats her.
Red Baron: Declares herself as the "Prediction Princess", even though that's actually Mieru's title.
Rich Bitch: Something that she's called out by Millefeui when they duel.

Yugo

This blue haired and yellow banana banged duelist is Haruka's opponent in "Before the Storm", born and raised in Domino Below, and the two begin to develop feelings for one another throughout the course of their duel.

Adaptational Intelligence: While Book Dumb in the show, he has above average grades, named his D-Wheel after a goddess and is well-read upon the mythology of ravens.
Ambiguously Bi: "Before the Storm" has him develop feelings for Haruka, but he seems to be blushing when he and Yuri meet face to face (although that's probably since they have similar faces).
Animal Motif: Bees (his favorite animal) and Ravens (he carries a Yata-Garasu card)
Cool Bike: His D-Wheel, of course.
Fanboy: He's into Tokusatsu shows.
Happily Adopted: When he was a kid, he was raised by Jonathan and Edna (the couple from the Pokémon episode "Time Warp Heals All Wounds").
I Call It "Vera": His D-Wheel is named "Mellona", the Roman goddess of Honey.
Love at First Sight: Somewhat; he is shown to have budding feelings for Haruka, but he is also gobsmacked when he sees Yuri for the first time.
Never Heard That One Before: Snorts when he assumes Yuri is gonna mention his yellow bangs reminding him of a banana.

Seymour

A professor at Domino City University who has a new archetype of monsters known as "Cryptids" and duels Hikari in "So Weird".

Brainy Brunette: Has brown hair and is a professor of cryptzoology.
Dark Is Not Evil: His Cryptid monsters are all Dark attribute, but he's a friendly teacher.
Graceful Loser: Shows no bad feelings losing to Hikari and is willing for a rematch once he has new cards made.
Mr. Exposition: He uses the duel to help explain the backgrounds of his Cryptid monsters.
Those Two Guys: He's accompanied by Ken and Mary (of the Pokémon Mystery Club) who act as his assistants.
Unexpected Character: He's from the first season of Pokémon for those who aren't aware of him.

Barbara

A famous thief called "Thief of the Thorned Rose" who is seeking the legendary artifact called "The Sphinx's Heart". She wields the Dark Scorpions and duels Molly Hale in "Night at the Museum".

Be Careful What You Wish For: Wants the Sphinx's Heart as it grants its wearer immortality. She gets it in the end, becoming immortal by transforming into a stone statue.
Scary Scorpions: She has the Dark Scorpion monsters, a scorpion tattoo on her arm and her Duel Disk is modeled after a scorpion.
Would Hurt a Child: She has the Dark Scorpions knock Molly unconscious, shows no qualms in having her monsters attack the girl directly and threatens to shoot her if it means getting the Sphinx's Heart.

Other characters

Satoshi

Serena's deceased older brother. According to her, he appeared as a spirit when she was forced into a haunted mansion, giving her the strength to be brave and the love of the macabre.

Cool Big Bro: Serena certainly thought so.
Death by Origin Story: His death is tied to how Serena obtained her Ghostrick monsters.
Expy: Seems to be one of Ash. He's a boy who is attached to Serena's backstory in someway, and it is his hat and jacket that she wears to remember him by.
- According to Word of God, his appearance is based off Calem.
Not Too Dead to Save the Day: He arrives to give Serena comfort to confront the Ghostrick monsters in the Haunted Mansion she was forced into, also telling her to tell her that monsters aren't scary at all.
Posthumous Character: Died when Serena was about five or so.
Too Good for This Sinful Earth: A sweet and adventurous boy whose life was tragically cut short.

Marilyn

A girl in Rebecca's class who is into everything cute, much to Rebecca's annoyance. She wields a Fluffals/Frightfur deck that is borrowed by Freddy. Appears in the Alea Iacta Est story "Marionettes Inc."

Big Damn Heroes: Saves Rebecca from being attacked by Springtrap by use of a fire extinguisher.
Green-Eyed Monster: She's jealous of Rebecca's popularity and skill as a duelist.
Hypocrite: Has three specific rules about "Cute" Duel Monsters, but when Rebecca notes that Freddy is dueling with Marilyn's Duel Disk and the monster he played is Fluffal Dog (A Level 4 Effect Monster with 1600 ATK points when Marilyn stated that one of her rules was that the monster had to have less than 1500 ATK), she calls Marilyn out about this.
Mythology Gag: Her 3 rules of cuteness when it comes to Duel Monsters (must be a Normal/Effect monster, be Level 4 or lower and have less than 1500 ATK) is a reference to her rules of cuteness in the anime (Not evolved, be less than 2 feet and "absolutely adorable")
The Nicknamer: Calls Rebecca "Becky", in an attempt to seem "cuter".

Calista

A young girl who runs the "Sphinx Shop" in Domino Below alongside her grandfather, Tensen Yanagi. She's unable to age due to an incident meeting her future self when Zero Reverse hit.

Dreaming of Things to Come: She can communicate with "Future Me" (her future self) in her dreams.
Knowledge Broker: She is the one who knows about ancient artifacts whenever the Dark Signers need help.
Mythology Gag: She's related to Yanagi (who uses a deck revolving around ancient artifacts); her dream in the anime was to become an archaeologist.
Not Allowed to Grow Up: She's "displaced" due to an encounter with her future self and is still the same age of 10 when Zero Reverse struck.
Related in the Adaptation: She's Yanagi's granddaughter in this series.

Mieru Hochun/Aura Sentia

A young fortune-teller in training who appears in the Alea Iacta Est story "A Little Princess" when someone has taken her name and deck. She returns in Nobus Vivus Manes as its narrator.

Character Narrator: Of "Nobus Vivus Manes".
Dub Name Change: Has to change her name to "Aura Sentia" in "A Little Princess" since someone stole her name until Millefeui wins it back.
Iconic Item: She never goes anywhere without her crystal apple.
Light Is Good: Her Magic Circle in Nobus Vivus Manes lets her summon golden chains of light, not to mention that her strongest monster — Prediction Princess Tarotei — is Light attribute.
Oblivious to Love: Nobus Vivus Manes has her oblivious to Masato's crush on her. Justified in that she's known to have a love for handsome men and Masato is only a kid.
Tarot Motifs: In "A Little Princess", she's represented as The Sun.
Third-Person Person: As Aura, she has a tendency to use her name in place of pronouns.
Yaoi Fangirl: Absolutely coos over the idea of Team Satisfaction being together.

Yuri

The right-hand watchdog of Leo Akaba who appears in the Alea Iacta Est story "Before the Storm". His goal revolves around having Yugo by his side, and he'll do anything to accomplish that.

Appears in Do ut Des, attempting to take Rui for an unknown purpose.

Ambiguously Evil: Yuri is loyal to the professor, that's for sure, but he seems to have some ulterior motive for having Yugo by his side. And since he appears in Legend of the Three Caballeros: Dark Signs of the Sun (which crosses over with this series) he's probably not as evil than he was in the original anime..
Break the Cutie/Break the Haughty: Having to face his own dragon's attack in his duel against Rui pretty much traumatizes him, or he probably had it earlier after Rui decides to use him as a pincushion.
Crazy Jealous Guy: Does not like Haruka's affections towards Yugo at all.
Curb-Stomp Battle: On the receiving end, this time. Rui decimates him using her Earthbound Disciple's ability to cut his lifepoints in half and then brainwash Starving Venom Fusion Dragon to attack directly. The only thing that prevents him from losing is Wes taking the blow.
Dark and Troubled Past: When Rui pries into his memories in their duel, it shows him looking outside a window and seeing something move away in the distance. Before it continues, Yuri snaps and states to make it go away.
Early-Bird Cameo: Appears in the Alea Iacta Est story "Before the Storm" before making his proper debut in Do ut Des (which takes place months before "Before the Storm")
Foil: To Haruka. They both have feelings towards Yugo but show them in different ways: Haruka is more open and believes in Love at First Sight, while Yugo is shown to be more manipulative, going as far as hypnotizing Yugo to "reunite". They both have someone handing them missions regards to the boy, but while Team Satisfaction feel guilty into telling Haruka the truth and treat her affectionately, Professor Akaba is presumably like his anime counterpart in that he doesn't reign Yugo at all. Last but not least, Haruka is sweet, bubbly and cheerful while Yuri is full of deceit.
Flower Motifs: Roses and cherry blossoms: they decorate his pendulum and he wears a blend of this as perfume.
Hypno Pendulum: Has a purple crystal that he uses to hypnotize Yugo. Nobis Vivus Manes reveals that the pendant used to be Kanata's.
Psychotic Smirk: Flashes one of these when hypnotizing Yugo. The narration even states how his "venomous smile stretches out".
"Take That!" Kiss: Gives one to Yugo at the end of "Before the Storm", unaware that Haruka is watching the entire thing.
Yandere: He will have Yugo no matter the cost.

Dark King of the Afterlife

This strange figure rules Hamunaptra and he is the one whom the Dark Signers (and Team Satisfaction) follow. His end goal is to make Domino Below transform into the Gates of Hamunaptra.

Ambiguously Evil: Considering the states of the Dark Signers of this tale, and how he had to convert Kiryu to the cause, there is no evidence to suggest whether or not he's truly evil. At best, he's a Well-Intentioned Extremist.
Dark Is Not Evil:...Maybe. He does seem like someone who wants to bring peace to Domino Below, but considering what he needs in order to make it happen...
The Ghost: He's only mentioned in passing by Team Satisfaction and the Dark Signers; the closest that readers see of him is a large bust in his image.
No Name Given: He's usually referenced as the "Dark King".

Characters / Between My Brother and Me: Ab Initio

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