The characters who appear in Mnemosyne.
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Main Heroines
Rin Asogi
Voiced by: Mamiko Noto (JP), Colleen Clinkenbeard (EN)
- Anti-Hero: She's a good person at heart, but she has a rather icy personality. When she closes the door behind Sayara to let her get eaten by various, zombie like creatures (of her creation), she proves that, despite being on the side of good, she sure as hell won't forgive you for crossing the line.
- Back from the Dead: Or the closest variant for immortals. Her time spore is removed, but thanks to Yggdrasil, her body begins regenerating around it.
- Badass in a Nice Suit: She's a tough-as-nails P.I who dresses in a rather spiffy three-piece suit.
- Badass in Distress: Despite being very proficient in combat, she does get captured by Apos on a few occasions and requires her friends help to escape.
- Blind Without 'Em: Episode one hints that she had eye problems when she became immortal (and thus, can never be cured), so now she's forced to replace her Stoic Spectacles whenever they're destroyed. She seems to be able to see reasonably without them, but they're always the first things she goes for when retrieving her clothing.
- Cartwright Curse: Basically all her love interests except Mimi (Yanagihara, Ihika, Tajimamori) die.
- Deadpan Snarker: She's quite snarky when irritated, such as when Mimi compliments software blocking their hacking, telling her to stop acting so "fucking impressed".
- Expy: Aside from being a Distaff Counterpart to Tatsuhiko Shidonote , she bears more than a passing resemblance to Cima Garahau.
- Good Is Not Nice: Rin is nice, but she won't hesitate to end a bad guys existence in rather wicked ways.
- Good Thing You Can Heal: Rin is hurt to the point where a normal person would have died at least Once an Episode. Her personal best is regenerating from her own disembodied time fruit after Apos removed it from her.
- Identity Amnesia: After getting mulched by a jet engine and two decades of regeneration, she loses her memory. It comes back to her the next time she regenerates, when Laura kills her and her fiance Ichika in a surprise attack.
- Jerk with a Heart of Gold: She can be pretty cold and sarcastic, but she's still quite caring towards those close to her.
- Ms. Fanservice: Quite a bit of the fanservice in the series is provided by her.
- Private Detective: In the series' present day, Rin runs a private investigation service with Mimi as her plucky sidekick. The episodes mostly revolve around cases connected at least to the immortals, angels, and Yggdrasil, but they're also shown to do a fair amount of less interesting jobs to keep the lights on, even (in the pilot) hunting for somebody's runaway cat.
- Really 700 Years Old: She looks like a woman of about thirty but she's eventually revealed to be over 1,000 years old: a flashback shows her to have first met Tajimamori in the 11th century, during the Heian Period. She once passes herself off to an old woman she knew when she was younger as her own descendant.
- Resurrective Immortality: Courtesy of her time fruit, she can come back From a Single Cell.
Mimi
Voiced by: Rie Kugimiya (JP), Jamie Marchi (EN)
- The Ageless: She's frozen in the body of a girl of about sixteen despite being over a century old.
- Ambiguously Gay: Mimi openly has feelings for Rin and wants to stay by her side forever.
- Badass Bookworm: An immortal hacker. Kind of a requirement.
- Deuteragonist: She is the second main focus to the story.
- Girl Friday: For Rin.
- Hard-Drinking Party Girl: And she even holds her liquor better than Rin.
- Jerk with a Heart of Gold: Mimi can be rather snarky and blunt, but she means well.
- No Full Name Given: Whether "Mimi" is her given name, a surname, or a nickname is never revealed.
- Playful Hacker: Cheerful, loves teasing Rin about "Russian water", and is a very skilled hacker due to her age.
- Resurrective Immortality: Like Rin, she's an immortal, although she doesn't test it nearly as hard.
- Really 700 Years Old: Near the end she reveals she's past her first century or thereabouts.
- The Smart Girl: The tech-savvy sidekick.
- Token Mini-Moe: A slight older example but she always looks younger than everyone else she's around.
Maeno Family
Kouki Maeno
Voiced by: Nobuyuki Hiyama (JP), Robert McCollum (EN)
- And Then John Was a Zombie: To save the immortal Rin, he became an Angel.
- Backup from Otherworld: His spirit helps Rin escape from Yggdrasil in the last episode.
- Bungled Suicide: Near the end of the first episode he is left with a gun by Rin who tells him that only he can choose what path to take. A gunshot is heard offscreen, suggesting he killed himself. However, he shows up at Rin's office the next day with a bandaged head wound. How he survived shooting himself in the head is never revealed, though it's likely he changed his mind at the last minute as he fired the gun and the bullet only grazed him.
- Cloning Blues: He doesn’t take the news that he is a clone very well (even contemplating suicide) but does eventually accept it and move on.
- Deuteragonist: Serves as the viewpoint character, when Rin is more of the action protagonist. For the first three episodes, before he dies, that is.
- Ghost Memory: Why do his memories not feel "right"? Because they belonged to the original Kouki and were transferred into him by Sayara.
- Heroic Sacrifice: He consumes a Time Fruit to become an Angel and save Rin from Sayara.
- Killed Off for Real: Becomes an Angel and is shortly after killed by Apos, who plucks his time fruit from him.
- Locked into Strangeness: After attempting suicide and somehow surviving, he has a permanent spot of miscolored hair.
Yuki Maeno née Shimazaki
Voiced by: Yoshino Takamori (JP), Cherami Leigh (EN)
- Love Interest: To Kouki.
- Struggling Single Mother: Becomes this after Kouki dies, to Teruki.
Shougo Shimazaki (spoiler warning)
Voiced by: Hideo Ishikawa (JP), Ian Sinclair (EN)
- Arc Villain: Of Episode 2.
- Dying as Yourself: The last thing he does before he dies is call out to his sister Yuki.
- Tragic Villain: He acts violently in part because he became an angel and is having a hard time resisting his primal urges.
Teruki Maeno
Voiced by: Emiri Katou (Child) and Daisuke Hirakawa (Adult) (JP), Brina Palencia (Young) and Patrick W. Reid (Adult) (English)
- The Everyman: Like his father before him, at least until he grows up and becomes a CEO.
- Generation Xerox: Like his father, he is The Everyman who gets entangled into a case with Rin, who flirts with him.
- Honest Corporate Executive: Seems to be this in Episode 5, as he is the CEO of Maeno Holding Group company, and just as much of a Nice Guy as he was in episode 4.
- Nice Guy: A bit more rough-around-the-edges than his father, but still a friendly guy.
Mishio Maeno
Voiced by: Kaori Nazuka (JP), Luci Christian (EN)
- Amateur Sleuth: She talks to herself and in the process does a lot of Shout Outs to Sherlock Holmes as she investigates Rin, to the point of using a faux-British accent in the dub. At best, though, she only tries to be this.
- Badass Normal: Despite being a mere human and not an immortal or angel, she is able to break into the enemy castle and stand up to Apos.
- Shameless Fanservice Girl: Much to her father's annoyance, she frequently goes out clad only in virtual clothes aside from her underwear.
Antagonists
Apos
Voiced by: Akira Ishida (JP), Todd Haberkorn (EN)
- A God Am I: Since he possesses traits of both immortals and angels, he views himself as the closest thing to a genuine god.
- Arch-Enemy: To Rin.
- Asshole Victim: It is rather hard to feel sorry for him as he gets dragged into Yggdrasil, which is the fate he wanted to inflict on Rin.
- Be Careful What You Wish For: He wanted to permanently secure his position as Guardian of Yggdrasil. In the end, Apos got exactly what he wanted, hysterical screams of terror as he is literally dragged into Yggdrasil notwithstanding.
- Big Bad: He leads the angels, is Rin’s greatest enemy, and the man behind the other villains she faces.
- The Chessmaster: Apos' plan has been in the works for centuries.
- Dragged Off to Hell: While not quite Hell, this is his ultimate fate as he is dragged into the egg containing Yggdrasil.
- Expy: Of Satan/Ryo Asuka from Devilman and Lan Asuka from the Devilman Lady anime, as all of them are blonde hermaphrodites that serve as the Big Bad of their respective series, though moreso the latter given the sheer evilness of both their characters (whereas Satan is a Tragic Villain).
- Evil Tastes Good: He is obsessed with causing as much pain to every immortal he finds because their time spores will taste so much better soaked with the memories of their pain.
- Face of an Angel, Mind of a Demon: Apos may look like a blonde pretty boy, but he's a ruthless Sadist who loves to torture immortal women.
- Faux Affably Evil: He'll put up a cheerful facade if he chooses, but it's just an act that hides an utter psycho underneath.
- From a Single Cell: Just like Rin.
- Hermaphrodite: It is unclear what the hell s/he is, but s/he apparently has two sets of genitalia.
- Hidden Agenda Villain: Exactly what he wants is not revealed until the final episode, where he reveals that he wants to become a permanent Guardian of Yggdrasil by feeding Rin to it and then turn all men and women into angels and immortals, respectively, then watch them destroy each other.
- I Have You Now, My Pretty: Lord help you if you're an immortal. He will chain you up and then sexually torture you.
- Karmic Death: He gains a permanent position with Yggdrasil, by becoming part of it.
- Manipulative Bastard: Convinced Shougo to use his angel powers for taking revenge against those who wrong him, seduced Sayara into working with him, and uses various other characters for his goals.
- Red Eyes, Take Warning: One of the first indications that he's a bad guy.
- Sadist: He takes pleasure in tormenting immortals like Rin.
- Self-Made Orphan: Kills his father, Tajimamori.
- Soft-Spoken Sadist: Rarely raises his voice, even when he has women bound in chains.
- Supernaturally-Validated Trans Person: Though he uses masculine pronouns, he self-identifies as both male and female in the show—meaning, as a host to a time fruit, he has the traits of both cis women (immortality, lucidity) and cis men (wings, arouses immortal women by his mere presence).
- White Hair, Black Heart: Big time.
Laura
Voiced by: Sayaka Ohara (JP), Clarine Harp (EN)
- Alas, Poor Villain: Near the end of her life, she's been beaten up repeatedly and reduced to Apos' sex slave. It's something of a mercy when she finally dies.
- Arc Villain: Essentially this for Episode 5, being the antagonist Rin fights in that episode.
- Bound and Gagged: It's hinted that she is the woman sitting on Apos' chess table that he has restrained in this way.
- The Dragon: To Apos.
- Implacable Woman: Absolutely nothing will stop her from killing Rin. Even when she is reduced to a head, she can still at least speak. Though possibly subverted/justified in that it’s hinted that her body is a mere avatar, with her real body being the restrained woman Apos torments.
- Professional Killer: Her main occupation.
- Psycho for Hire: Very psycho.
- Psycho Lesbian: Again, quite unhinged.
- Taking You with Me: A variation. After being crippled, she has Rin insert her Time Spore into Apos so she can torment him with her memories before dying.
- We Can Rebuild Her: Apos remakes her as a cyborg in Rin's image (which he proceeds to have some fun with) and implants a time spore in her as well.
Sayara Yamanobe
Voiced by: Rie Tanaka (JP), Monica Rial (EN)
- Arc Villain: Of Episode 1 and 3.
- Asshole Victim: It is rather hard to feel sorry for her as she gets eaten by her own zombies and later melted by Apos.
- Ax-Crazy: While softspoken about it, it's clear Sayara gets off on inflicting pain.
- Depraved Bisexual: She's a sexual sadist and rapes both Rin and Kouki in episode 1.
- Dirty Coward: After Rin overcomes her zombie hordes and leaves her at their mercy, Sayara cries and begs for her mother.
- Immortality Hurts: Apos grants her immortality sometime after episode 1. However she's preserved in the state she's in, and after being partly eaten by zombies and set on fire, Sayara is permanently stuck that way. She lamented that it took over 20 years for the technology to develop so she could walk again.
- Mad Scientist: At first she dabbles in cloning (which produced a number of defective pained zombies), then later upgrades to bioterrorism.
- Omnicidal Maniac: Post-cyberization, all she really wants is to exterminate all humans with a new disease.
- Sadist: She enjoys hurting people, and not just to scientific ends.
- Starter Villain: The villain of the first episode, and the first major villain Rin faces. She also returns as the villain in episode 3.
Episode 2 Antagonist (spoiler warning)
See Shougo Shimazaki.
Episode 3 Antagonist (spoiler warning)
See Sayara Yamanobe.
Ruon Kamiyama (spoiler warning)
Voiced by: Hitomi Nabatame (JP), Tia Ballard (EN)
- A.I. Is a Crapshoot: Upon meeting Teruki, she becomes an obsessive Yandere for him.
- Arc Villain: Of Episode 4.
- Brain Uploading: Her father uploaded her onto the 2.0 net.
- Because You Were Nice to Me: The reason she fell for Teruki is because he was the only guy who treated her as more than a sex doll by asking to meet her offline.
- Kiss Me, I'm Virtual: Her role as an online sex doll.
- Offing the Offspring: Was a victim of this by her father, who effectively killed her by Brain Uploading her into the net.
- Walking Spoiler: Her status as Episode 4’s anatagonist and her backstory, motivations, etc, make her this.
- Yandere: She falls for and captures Teruki, seeking to make him hers.
Others
Tamotsu Yanagisawa
Voiced by: Yasunori Matsumoto (JP), Christopher Bevins (EN)
- The Informant: Plays this role, providing Rin with info on the episode’s case.
- Killed Off for Real: Shot by by a military sniper following AI Ruon's orders in episode four.
Genta
- Big Friendly Dog: As well as immortal like her owners.
- Evil-Detecting Dog: In episode 5, she growls at Laura after she gets a cyborg body that looks just like Rin.
- Killed Off for Real: In episode 5.
Informants
First informant Voiced by: Rumi Kasahara (JP); Wendy Powell (EN)
Second informant Voiced by: Emi Nakashima (JP); Terri Doty (EN)
Third informant Voiced by: Kiyoko Nagaki (JP)
- The Informant: All three of them play this role, providing info on the episode’s case.
- No Name Given: None of the three informants are ever named.
- Sex for Services: What they charge for information.
Ihika
Voiced by: Rikiya Koyama (JP), J. Michael Tatum (EN)
Rin’s lover in Episode 5.
- And Then John Was a Zombie: Apos turns him into an angel in the last episode, forcing Rin to kill him.
- Dying as Yourself: He apologizes to Rin after she kills him in angel form.
- Love Interest: To Rin in episode 5, when she is amnesiac.
Tajimamori (spoiler warning)
Voiced by: Masahiko Tanaka (JP), John Swasey (EN)
- All Myths Are True: He is based off a Japanese legend.
- Chekhov's Gunman: A trait he shares with his descendents.]]
- He Who Must Not Be Seen: We don't meet him until the final episode.
- Our Angels Are Different: The only Angel who has no desire to eat someone.
- Someone to Remember Him By: He gets Rin pregnant with a son who will be the next Guardian of Yggdrasil when they have sex in the final episode. Apos kills him moments later.
- Star-Crossed Lovers: With Rin. He saved her life a thousand years ago and they've been dancing around each other ever since. In the final episode they sleep together in what is probably the most genuine act of lovemaking in the entire series, only for Apos to kill him minutes later.
- There Can Only Be One: One Guardian. And Apos decides that Tajimamori is not the one anymore.
- Walking Spoiler: His entire existence remains a mystery until the final episode. His status as the Guardian of Yggdrasil is a major plot point that explains Apos' motivations.
