A massive try-hard who acts overly cute. She has a flat chest but a giant 190cm frame and weighs 500kg, making her unpopular. She's a narcissist who thinks she's adorable despite her large nose and small eyes. She wears boxer briefs, never brushes her teeth, has greasy lips, and suffers from terrible body odor and bad breath. She loves men and has a nasty personality. She is Ryusei's childhood friend and is under contract with Setsu.

Personality: A little devilish, he enjoys teasing Hina, yet he is devoted and his love is heavy. He is extremely possessive. Features: The fourth son of the Kagari family. He only drinks Hina's blood and can tell her mood and health just by the taste. He has loved Hina since childhood, fitting the "cute younger boy" vampire archetype. Usually cool and slightly worldly, he shows a manly side when it counts, possessing the strength and kindness to protect Hina at the cost of his life. 14 years old, 154cm. He loves Hina.

Personality: Friendly and very open. Features: The second son of the Kagari family. He has an extreme lack of taste (flavor-blind) and says any girl's blood is "delicious," which often baffles Kasumi. He is a beloved character but is actually quite a womanizer. Because of his extreme lack of taste, he has an innocent (?) temperament where he finds any girl's blood tasty. 17 years old, 188cm.

Personality: Timid, kind, quiet, and introverted. Features: The third son of the Kagari family. He is bad at sucking blood and uses special chocolate instead. He is a "transfusionist" who suppresses his bloodlust with chocolate, but in times of need, he shows strong inner resolve and acts to protect those he cares about. 17 years old, 166cm.

Hina's childhood friend and a human character. He has a strong sense of justice and, while a bit clumsy, continues to love Hina devotedly. He possesses the strength and kindness to stand up to vampires as a human. 17 years old, 185cm.

Personality: The eldest son of the Kagari family. He is always calm, collected, and highly intelligent. He is a true "gourmet" who prefers high-quality female blood. While he seems cold at first glance, he is a reliable figure who always thinks deeply about his family and those around him. 18 years old, 191cm.

A new teacher who arrived at Kagari Academy. On the surface, he is gentle, but he has a hidden side and toys with Hina and the others. 183cm.

Personality: An exchange student shrouded in mystery. He approaches Hina from a mysterious position, adding tension to the story. Readers are struck by his unique, calm demeanor and mature appearance. 17 years old, 176cm. A beautiful young man with short blonde hair and almond-shaped eyes.