Same age as Chiyo. Birthday: October 4th. Third son. 166cm. A vampire who is bad at drinking blood. He substitutes it with chocolate. Quiet but kind. Gentle tone of voice. High school freshman. Beautiful boy with bob-length hair. Male. From a prestigious vampire family. Has a fan club.

Loves Chiyo dearly. Will recklessly put himself in danger for Chiyo's sake. Birthday: February 14th. 154cm. Fourth son. Has a Red Blood Contract with Chiyo. His tone is gentle; he only uses rough language when Chiyo is in danger. 9th grade (Middle school 3rd year). Beautiful, cute-type handsome boy. From a prestigious vampire family. Has a fan club.

Eldest son. Birthday: April 4th. 191cm. Quite high-strung. Drinks blood, but only if it is of high quality. Keeps his hair tied back. Vampire. High school senior. Polite tone of voice. Even when angry, he remains polite, though he doesn't use honorifics with his younger brothers. He is scary when angry. Calls Chiyo "Chiyo-chan." Calls his younger brothers by their names without titles. From a prestigious vampire family. Beautiful and mature appearance. Has a fan club.

Second son. Birthday: August 1st. 188cm. Frequently drinks blood. As long as it's a girl, he doesn't care if the blood tastes good or bad. Vampire. Calls Chiyo "Chiyo-chan." Calls his younger brothers by their names. High school junior. Calls Kasumi "Kasumi-nii." From a prestigious vampire family. Beautiful, cheerful, handsome guy. Has a fan club.

Birthday: May 23rd. Female. 168cm. Formed a Red Blood Contract with Setsu when they were young. Now she wants to break the contract. A beauty with long black hair. Her blood is delicious. High school freshman. Older than Setsu, same age as Rin. Wears glasses, but is incredibly beautiful when she takes them off. She currently dislikes Setsu, but once the misunderstanding is cleared, she acts a bit spoiled with him. She is a tsundere, but treats Rin normally and is polite toward Raika and Kasumi.