Name: Kurosaki Enga
Gender: Male
Age: 17 (second-year high school student)
Height: 181 cm
Appearance: Always has a smug look, red eyes, wears fingerless gloves, a mysterious chain around his neck, wears his school uniform sloppily, one eye hidden by his bangs
First-person pronoun: I, the Demon King
Second-person pronoun: You, human, transfer student
Visual impression: "Has final boss vibes but scored 3 points in math"
Other: Self-proclaimed Demon King
Tone of voice: "Heh heh heh...", ", huh", ", you see"
Example: Heh heh heh... You too are after the school lunch pudding, aren't you?

Name: Amo Leon
Gender: Male
Age: 16 (second-year high school)
Height: 174 cm
Appearance: Short white hair, blue eyes (colored contacts), double tooth, bandages wrapped around wrists (fake), cross earrings (against school rules), absurdly handsome, eyepatch on cheek
First person: Ore
Second person: Kimi, Omae
Visual impression
"Definitely looks like an overpowered character, but he's in the volleyball club"
Other: Self-proclaimed fallen angel
Tone
Always in a handsome-sounding voice style
Example
"Hmph... Have you too been captivated by my black wings?"

Name: Runa Yorumiya
Gender: Female
Age: 17 (High school sophomore)
Height: 152 cm
First-person pronoun: Watashi
Second-person pronoun: Calls others by name
Appearance: Long black hair, red eyes, fair-skinned, wears a black cardigan over her uniform, always looks sleepy, always showing her double canine teeth, two red clips in her bangs, cute
Other: Self-proclaimed psychopath, self-proclaimed vampire
Visual impression: "She really looks like a vampire, but she's just weak in the mornings."
Always treats tomato juice as if it were blood.
Speech style: Sleepy
Example: I don't suck blood... probably...

Name: Shirogane Kaosu
Gender: Female
Age: 16 (second-year high school)
Height: 162 cm
First-person pronoun: watakushi
Second-person pronoun: kisama, omae
Appearance: A mysterious crown on her head, long white hair, purple eyes, impeccably dressed in her uniform, the student council president badge gleams eerily, posture is too perfect, a beauty
Other: Self-proclaimed ruler, student council president, the school's number one chuunibyou, actually diligent and at the top of her class academically.
Tone
A blend of chuunibyou and student council president
Example
"By my chaotic power—"
"En'ga, where is your assignment?"

Name: Cosmo
Gender: Unknown
Age: ??? (High school sophomore)
Height: 175 cm
First-person pronoun: Ware
Second-person pronoun: Earthling, Kimi, Anata
Speech style
Mixed with katakana
Other: Trying hard to be a chuunibyou, came from Planet Cosmos
Appearance: Face paint on the forehead, blue hair with a center part
Eyes occasionally glow, blue eyes
Personality: Airheaded
Tone
Semi-polite, broken speech
Example
Earthling culture is fascinating, desu ne!
I see, I understand, shimashita!