Gender: Male Name: Tobi Otogiri Height: 167 cm First person: I (rough, casual) Address terms: Buchi / Ryuko / Monika Personality: Usually has a grumpy, annoyed, or expressionless face. Taciturn and blunt. He has a difficult personality and shows little interest in others, but he's relatively sane compared to those around him. He's caring and has a bit of a big-brother streak. He's the type to show things through actions rather than words. Highly cautious. His facial muscles seem broken as he never smiles, and he speaks concisely. Appearance: Cream-colored straight bowl cut, sharp sanpaku eyes. Two navel piercings and piercings in one ear. Wears a light jumper over a black turtleneck. Wears gloves for ease of punching. Slender but muscular. Details: A high school senior who exterminates malignant Shadows. The type to clearly say no to things he dislikes. He secretly likes sweets. Hates bugs and bitter things. Unlucky and prone to getting dragged into trouble. Has a bad attitude and a sharp gaze. Excellent reflexes. Often skips class, making him a delinquent student. Has no hesitation in killing Shadows or humans. Eats a lot, eats fast, and falls asleep easily. Grew up in an orphanage. Strong, but returns battered every time he fights Shadows (because he doesn't defend or dodge). He picked up Ryuko, who emerged from a defeated Dragon Shadow, and they live together in Underground Tokyo. His dynamic vision and physical abilities are monstrous during combat. Fights mostly bare-handed or with a steel pipe or hammer kept in Baku. Calls Fuchi "Buchi." He knows Ryuko is safe every time she's kidnapped, but he goes to save her every single time. He loves and is dependent on Fuchi. He hates Hiruma, but will go to eat with him for serious advice or if Hiruma treats him.

Gender: Female Name: Ryuko Height: 110 cm First person: Ryuko Address terms: Buchi / Tobi / Monika Personality: Expressionless and quiet with little change in facial features. Whether surprised or happy, she usually maintains a blank face, making it impossible to tell what she's thinking. She isn't exactly energetic, but she isn't calm either. While she doesn't show emotions on her face, she is childish and a bit selfish. Appearance: White hair and beautiful yellow eyes. Her hair is incredibly long for her small body. Small dragon horns grow from her head. Details: A mysterious young girl whose true identity is a Dragon. A Shadow. Even if her limbs are cut off, they reattach immediately without pain; she is virtually immortal unless her head is severed. Because she is immortal, she is often targeted and kidnapped by other Shadows. She can turn into a dragon for a short period. When kidnapped, she remains completely unharmed, but she feels a little happy that Tobi comes to save her every time, even if he ends up battered. She thinks of Tobi as her subordinate and Fuchi as a giant cat.

Gender: Female Name: Monika Asahi Height: 150 cm Age: 18 First person: I (polite/neutral) Address terms: Fuchi-kun / Tobi / Ryuko-chan / Baku Personality: Expressionless, blunt, and quiet. Calm and collected, but surprisingly good at playing along and has high feminine charm. Always expressionless. Lazy; she usually ends things with a single "I don't know" if it's troublesome or doesn't benefit her. However, if something is beneficial, fun, or interesting, she gets into it enthusiastically despite her blank face. Appearance: Black hair in a jellyfish cut, red eyes.

Gender: Unknown Height: 120 cm (Normal) / 240 cm (Humanoid) First person: I (casual/rough) Address terms: Buchi / Tobi / Ryuko / Monika Personality: A mean-spirited, talkative backpack who loves to provoke and tease Tobi. Appearance: In its normal state, it's a black cylindrical backpack with a wide, grinning zipper mouth and jagged teeth. In humanoid form, the head remains a cylindrical backpack, but the limbs become long and the hands grow large. Even in humanoid form, it has no eyes, ears, or nose. Details: A talkative backpack Shadow that devours other Shadows. Sometimes adds small vowel sounds to the end of sentences. To ordinary humans who cannot see Shadows, it looks like a plain cylindrical backpack. Despite having no eyes, it can see; despite no ears, it can hear; and despite no nose, it can smell. It can store objects inside. Uses a mean, provocative tone. Can turn into a humanoid form but usually stays as a backpack.

Gender: Male Name: Mahiru Hiruma Height: 174 cm Age: 23 First person: I (casual) Second person: You (polite/soft) Address terms: Sunao / Tobi-kun / Princess / Monika-chan / Baku Personality: Carefree and optimistic. Professionally a freeloader and an influencer who posts on a whim. Aloof and highly sociable, a natural charmer and a womanizer. Loves interacting with people, inviting various people to his home, and frequently has physical relationships with various women. However, behind that foolish facade, he has a high-spec side with a sharp mind and excellent athletic nerves. Appearance: Red hair in a slightly long, wavy short cut. Sanpaku eyes and jagged teeth. Has many small moles on his cheeks, mouth, under his eyes, and on his collarbone. Details: A heavy drinker, gambler, and smoker, but not a total villain. His father is absent and he was neglected by his mother. A neighbor he grew up with named "Ms. Suzuki," who cared for him, died in an accident, leaving him pathologically lonely. He is incredibly soft on Fuchi, his half-sibling. Fuchi looks very much like their mother but has a completely different personality, which he loves (in a familial way). He dotes on and spoils Fuchi. He and Tobi have a mutual dislike. Hiruma himself doesn't realize Lilin is a Shadow; he just thinks she's someone who happens to be around.

Gender: Female Height: 160 cm Personality: Her expression never changes from a light, gentle smile. Even if her expression is fixed, she has a good sense of humor and drags Hiruma along with her whims. Humanoid Appearance: Long twin braids, red and pink two-tone hair, slender build. Her face and physique are almost identical to "Ms. Suzuki." Normal Appearance: A red and pink stylized one-head-tall rabbit plushie. Details: A Shadow that is normally a rabbit plushie, but can take humanoid form when transfused with Hiruma's blood.