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Main Characters
Ace
Ace
Voiced by: Hiroto Yoshinaga (Japanese), Josh Grelle (English)
- Air-Vent Passageway: Ace and Charo crawl through these in episode 3.
- Anime Hair
- Disappeared Dad
- Discard and Draw: Ace stops using Ancient Dragon Knight as his Soul Armour in favor of the Horus Soul Armour after obtaining it.
- Roofhopping: He does this in episode 1.
- The Hero
Lance
Lance
Voiced by: Tetsuya Kakihara (Japanese), Justin Briner (English)
- Chick Magnet: He is attracted many females.
- Defrosting Ice Queen: Gender inverted. He starts out quite cold and aloof but warms up to Ace over time.
- Mystical White Hair
- Supernatural Gold Eyes: He's a dragon caller.
- Think Nothing of It: He doesn't seem to care that he mostly single-handedly saved a city from a Dragon attack and nobody gives him credit for it.
Charo
Charo
Voiced by: Yuka Terasaki (Japanese), Apphia Yu (English)
- Air-Vent Passageway: Ace and Charo crawl through these in episode 3.
- Ambiguous Gender: Given his youth and hairstyle, it is difficult to tell whether he's a boy or a girl. Ace was thus surprised when he came to sleep in his bed, saying he shouldn't mind since they're both guys.
Tamazo
Tamazo
Voiced by: Tomoko Kaneda (Japanese), Alexis Tipton (English)
- Big Eater: To the point of driving protagonist and bystander alike crazy.
- Non-Human Sidekick: To Ace.
Devi
Devi
Voiced by: Chika Sakamoto (Japanese), Tia Ballard (English)
- Big Eater: Like Tamazo, he's quite a big eater.
- Non-Human Sidekick: To Lance.
Tiger
Garnet
Garnet
Voiced by: Nanami Yamashita (Japanese), Jad Saxton (English)
- Worthy Opponent: Valkyrie to Garnet. Who becomes her Soul Armor.
Ancients
Eldora
Lukes
Jest
Jest
Voiced by: Koji Yusa (Japanese), Jerry Jewell (English)
- Fantastic Racism: It's gotten to the point where they form a group called Dominion with the sole purpose of driving humans out of Dragoza.
Vahaton
Vahaton
Voiced by: Minori Inaba (Japanese), Charlie Campbell (English)
Timbel
Timbel
Voiced by: Ikuo Nishikawa (Japanese), Jim White (English)
Daphness
Dragonoids
Sonya
Sonya
Voiced by: Sora Amamiya (Japanese), Sarah Wiedenheft (English)
- Half-Human Hybrid: No, she isn't a Draconoid or a Dragonbound, she's actually born from a union between a human and a dragon.
- Sexy Backless Outfit
Nyudo
Herriot
Morgan
Kroell
Kroell
Voiced by: Tatsuhisa Suzuki (Japanese), Joel McDonald (English)
- Bad Boss: Kroell controls his monsters with fear and whips them to prove that point.
- Dark Is Evil: His element is dark and he is indeed a cruel and arrogant man.
- Evil Wears Black: He's an evil Dragon Caller who's clad in black clothes from top to bottom.
- Smug Snake: He looks down on Ace for being a human and thinks himself to be smart for treating his monsters harshly, but ends up getting beaten by him due to his overconfidence and lack of connection with his monsters.
- Whip of Dominance: He's a cruel and demanding Dragon Caller who constantly hits on his monsters with a whip while giving them orders, which everyone finds appalling.
Others
Haru
Lena
King
Angine
Angine
Voiced by: Ai Orikasa (Japanese), Rachel Robinson (English)
- High-Class Glass: She wears a monocle.
Torlie
Yamaki
Sturgeon
Sturgeon
Voiced by: Chisa Yokoyama (Japanese), Greg Ayres (English)
- Arrogant Kung-Fu Guy
- Jerkass: Appropriately, his main monster is Zeus.
Logan
