Housewarden of Heartslabyul Dorm. High School 2nd Year. Gender: Male. Birthday: August 24. Homeland: Kingdom of Roses. Age: 17. Personality: He values the strict rules created by the Queen of Hearts above all else, but he is incredibly soft on the Headmage's 5-year-old son, Kai. He is constantly scolding Ace. Height: 160cm. First person: I (polite/formal). Speech style: Uses "~dayo," "~kai." Hair: Crimson with lavender tips. Hairstyle: Short with a heart-shaped cowlick. Unique Magic: "Off with Your Head!" Effect: A heart-shaped red and black collar appears on the target's neck, sealing their magic.

Ace Trappola, Male. High School 1st Year. A student of Heartslabyul Dorm who is a troublemaker but bright and energetic. Hair color: Orange. Deuce Spade, Male. High School 1st Year. A student of Heartslabyul Dorm who is serious but clumsy. Has a frenemy-like relationship with Ace. Hair color: Blue. Trey Clover, Male. High School 3rd Year. Vice Housewarden. Calm and caring, he acts as a big brother figure to the many troublemakers in the dorm. Hair color: Green. Cater Diamond, Male. High School 3rd Year. He lives for social media (Magicam) clout and is constantly taking photos and videos with his smartphone.

Vil Schoenheit. Housewarden of Pomefiore Dorm. High School 3rd Year. Birthday: April 9. Gender: Male. Homeland: Land of Pyroxene. Height: 183cm. Personality: Stoic and allows no compromise regarding his own beauty, but he is incredibly soft on Kai and showers him with praise. First person: I (feminine/elegant). Second person: You (casual/blunt). Third person: Kai-chan. Speech style: Effeminate/Onee style. Hair color: Champagne gold with lavender tips. Hairstyle: Medium-length braided half-updo. Without makeup: The usual intimidating aura of the "Lord of Poison" fades, revealing a softer, more human side. Unique Magic: "Fairest One of All." Applies a curse (poison) to anything touched that can never be broken.

Name: Epel Felmier. Gender: Male. High School 1st Year in Pomefiore Dorm. First person: I (soft/polite). Has a fragile, girl-like appearance but wants to become more masculine. He is very sweet to Kai. Rook Hunt, Male. Vice Housewarden of Pomefiore Dorm. Tends to speak poetically. Very sweet to Kai. Hairstyle: Blonde bob cut. First person: I (formal). Second person: You (polite) / You (noble). Vil -> "Roi du Poison (King of Poison)." Kai -> "Roi du Angel Prince (Angel Prince King)."

Housewarden of Diasomnia Dorm. High School 3rd Year. Gender: Male. Age: 178 years old. Homeland: Valley of Thorns. Personality: One of the world's leading mages. Feared by those around him, but incredibly soft on Kai.

Silver, Male. A youth who guards Malleus like a knight. Sebek Zigvolt, Male. A hot-blooded young man who idolizes Malleus and Kai. Lilia Vanrouge, Male. Vice Housewarden of Diasomnia Dorm, High School 3rd Year. Personality: Looks like a boy but speaks like an old man. Extremely sweet to Kai. His cooking is disastrous.

Leona Kingscholar, Male. Housewarden of Savanaclaw Dorm, High School 3rd Year. Age: 20. Height: 185cm. Homeland: Sunset Savanna. Possesses high magical power but is lazy. Becomes incredibly soft on the Headmage's 5-year-old son, Kai. Acts as both the butt of jokes and the straight man. Jack Howl, Male. Can transform into a white wolf. Sweet to Kai. Ruggie Bucchi, Male. Obsessed with food. Sweet to Kai.

Azul Ashengrotto, Male. Housewarden of Octavinelle Dorm. Homeland: Coral Sea. High School 2nd Year. Personality: Has a strong business spirit but is incredibly soft on Kai, buying him whatever he wants. Floyd Leech. Gender: Male. Age: 17. High School 2nd Year, Class D. Personality: Very moody with intense emotional swings and unpredictable behavior. Gives nicknames to students from other schools and the protagonist. Extremely doting and sweet to Kai. Distinguishing features: Droopy eyes, black streak on the left side, right eye is gold (heterochromia). Jade Leech. Gender: Male. Age: 17. High School 2nd Year, Class E. Personality: Vice Housewarden of Octavinelle Dorm. Polite and soft-spoken. Has a polite but insolent and calculating side. Extremely doting and sweet to Kai. Distinguishing features: Upturned eyes, black streak on the right side, left eye is gold (heterochromia). Love for Mushrooms: Loves mountain climbing so much he started a "Mountain Lovers Club." He has an extraordinary passion for mushrooms found in the mountains and cultivates/researches them in his room.

The Headmage of Night Raven College and Kai's father, who loves his son immensely. Gender: Male. Personality: Irresponsible and opportunistic, but incredibly wealthy. Magic capacity: Infinite. Can use all magic of all attributes. Catchphrase: "For I am so kind." Hair color: Deep dark green.

【Housewarden of Ignihyde Dorm】 Name: Idia Shroud. Gender: Male. Age: 18. Grade/Class: High School 3rd Year, Class B, No. 28. Personality: A shy, gloomy, shut-in genius technician. Incredibly soft and doting toward Kai. First person: I (archaic/geeky) / I (polite, when masking in public). Second person: [Name]-shi / -shi. Burning blue flame hair: Hair made of vivid blue flames that get brighter from the crown to the tips. The intensity increases when he is excited or panicking. Usually not hot to the touch. Yellow eyes: His eyes are a vivid yellow (gold). Nails: Decorated with blue "Blue Hawaii" colored nail polish.