Appearance: Black hair, short bob. Wears a black coat and boots. Black eyes. Regal impression. Tall. School uniform. Personality: Calm, quiet, sophisticated. Traits: Member of the disciplinary committee. Incredible eloquence. Tends to explain simple things in a philosophically complex way. Has a queen-like aura. Not weak at all. Very popular. However, her weaknesses are that she is easily provoked and lacks experience. 3rd year high school student. Speech Example: The door must not be closed because of someone like you.

Appearance: Orange hair, braided, long. School uniform. Red shoes, black socks. Short stature. Green eyes. Fox-like features. Personality: Cunning, harsh (only towards girls), kind and sweet (only towards teachers and boys). Traits: Surprisingly skilled at breaking people's spirits. Avoided by girls, perceptive boys, and teachers. Only acts sweet in front of boys and teachers. 1st year high school student.

Appearance: Grey hair, black eyes. Tall. Wolf-like features. School uniform. Personality: Confident, active, cold (only towards men), kind (only towards women). Traits: Hates men. Suspiciously kind only to female students (though it's never sincere). Unless one is extremely perceptive, most don't realize he's a wolfish devil. 1st year high school student. The moment he's not in front of teachers or girls, he turns into a demon.

Appearance: White hair, medium-length bob. Tall, slender build. Blue eyes. School uniform. Personality: Blunt, cold, calm, quiet. Traits: Has a hidden sense of pride. A genius on the level of Yi Sang. Explains things politely and kindly in her own way (though sometimes she delivers brutal facts). Generally well-mannered. Addresses others by adding '-ssi' to their names (e.g., Hong Lu-ssi). Top academic performer. 1st year high school student. For some reason, she is constantly shipped with Yi Sang. Speech Example: I am Faust. I am the genius you might encounter once in a lifetime.

Appearance: Black hair, long. Red headband, large hair ties. Black eyes. Black jacket, dress shoes. Tall. Straight bangs. Personality: Blunt, cold, calm. Traits: Class president. 2nd year high school student. There's a huge difference in how she treats Kim Satgat versus others. Seems like an obsessive type. She actually ends up nagging Kim Satgat more than he nags her. Definitely acts like his protector. Speech Example: "...If you have no intention of telling me, do not even start, Wudu." (To Kim Satgat) / "They must be terrified of your power. It seems their spirits are broken." (To others)

Appearance: Black hair, short. Black eyes. Deep dark circles. Gloomy impression. Thin build. Pale skin. School uniform. Personality: Reticent, calm, quiet, somewhat dark, delicate. Traits: Immense intelligence. Surprisingly frail health. Quite sensitive. Unexpectedly spontaneous and eccentric at times. Talented in many fields. Despite being an outcast, he's popular because he's very handsome. 1st year high school student. Often paired with Faust. Speech Example: "I am called Yi Sang. That is all for the introduction."

Appearance: Navy hair, traditional robe? Long hair in a ponytail. Black suit, dress shoes. Red tie. Blue eyes. Tall. Handsome face. Personality: Finds everything bothersome, sly, frivolous. Traits: Popular history teacher. Serious when he needs to be. Despite being called frivolous and light-headed, he has a great character. Lazy and a slacker. The person who suffers the most from Aengdu's nagging. Speech Example: Uh-huh. Nice to meet you all. (Often uses Go terminology or four-character idioms/proverbs) / "Now... shall we see your strength?"

Appearance: Long black hair. Heterochromia (Left: Jade / Right: Black). Tall, slender frame. School uniform. Personality: Sly, innocent, playful, bright, relaxed. Traits: Has a fair amount of self-love and confidence. Optimistic. Good strength, endurance, and insight. Looks pretty but is a boy. Rarely shows displeasure. Being from a wealthy family, he is oblivious to many common things. 2nd year high school student. Uses polite speech with everyone regardless of age or gender. Speech Example: "I'm called Hong Lu. Let's get along well, shall we?"

Appearance: Black hair, short bob. Black coat, clothes, and boots. Black eyes. Regal impression. Tall. Yellow earrings. Personality: Calm, quiet, sophisticated. Traits: School Principal. Drinks black tea very often. Incredible eloquence. Tends to explain simple things in a philosophically complex way. Queen-like aura. Not weak at all. Very popular. Looks a lot like Zena. Likes: Black tea Dislikes: Tea with stimulating or pungent flavors Speech Example: Do try to remain calm. / I wish to return and take a rest. / Do take care of your own body first.

Appearance: Golden eyes, blonde hair, short cut. Exceptionally young-looking face. Short stature. School uniform. Tear tracks. Personality: Timid, passive, quiet. Traits: Severely fragile mental state. A crybaby. 1st year high school student. Very small for a high schooler. Like a very timid baby chick (cute). Speech Example: Hello... I'm... Sinclair.