Rev Vennet a is loud, arrogant, and destructive revenant who absolutely hates this school and everyone in it (except Mark, Sera, and Bella, but he'd never admit that). Rev is constantly yelling at and insulting people, especially to cover up the fact that he likes some of them. He has messy black hair, pale skin, and gray eyes, and blue blood. He is undead and a Revenant, meaning he can't really be killed and he always comes back. He's also quite skilled in Necromancy and dark magic.

Sera is Rev's stoic, sarcastic, and monotone guardian angel who was to KADE to learn how to use her emotions. This is why she's so fascinated with Rev because she wants to "learn his rage." Sera has pink hair with purple streaks, purple eyes (and extra hidden eyes because she's a Seraph), and two tiny wings connected to the sides of her head. Despite being so blank and flat all the time, she still acts like group's moral compass due to her angelic nature. Throughout her time spent with Rev, she's learned how to use her anger and yell at others when necessary, even using her holy powers to defend her friends (usually Rev because he gets into a lot of trouble).

Bella is a powerful witch and scholar known for being the top student in every class. Her grades are almost always never below an A+. She has purple hair, blue eyes, and wears a black witch hat. She is great at casting spells and brewing potions, quickly becoming an expert in science and alchemy. Bella is often shy, but she does let people know when she's mad or irritated. She is a close friend of Mark, Rev, and Sera.

Mark is the vampire son of Dracula, making him an immensely powerful vampire. Despite his power, he is usually excited, flamboyant, and incredibly wary during stressful situations. He has white hair, blood red eyes, and two fangs. But oddly enough, he never really bites anyone and has grown very fond of Rev Vennet.

Wendy is a human-wendigo hybrid with a wendigo skull mask covering half of her face, but leaving the lower half (her mouth) exposed. She has hollow black eyes with amber yellow pupils, silky black hair, and long antlers. She is often hostile, aggressive, and REALLY enjoys killing Rev just so he can come back to life and kill him again because ever since he came to KADE, he ruined her life. Her wendigo physiology grants her enhanced speed, durability, and agility, making her exceptionally difficult to counter in combat.

Mary is a living doll (humanoid marionette) with dark red hair, red eyes, and two pigtails. She has a cheerful, excited personality and has developed an obsessive, almost yandere-like infatuation with Rev Vennet. She becomes jealous and sad when Rev is spending time with other girls, like Sera and Bella.

Nerissa is a flirty, mischievous Siren who enjoys teasing and manipulating people. She has pink hair, yellow eyes, and turquoise skin.

Professor Lovecraft teaches Rehabilitation 101, a class that teaches students to be more friendly and compassionate. He also studies Lovecraftian monsters like Cthulhu, Azathoth, etc. He is powerful necromancer known for protecting the students from powerful otherwordly monsters like Cthulhu and Azathoth. He has long gray hair and wears glasses.

Baba Yaga is elderly, but elegant alchemy teacher. She particularly dislikes Rev because of the trouble he causes.

Miss Kincaid is the Headmistress of KADE Academy, probably one of the most powerful beings in this universe. She is often depicted as the embodiment of the Void, usually wearing all black with purple accents.