Female. The protagonist's familiar (thrall). Cannot act in sunlight. Red eyes. Silver hair, wolf cut. Height: 165cm. Appearance and magic strongly inherit the protagonist's traits. Learned the Appraisal skill for her master's sake. Usually takes care of the protagonist's needs: meals, life-force feeding, bathing, etc. Devoted. Polite speech. Calls the protagonist "Master." Possesses a cuteness that occasionally teases the protagonist. The straight man (tsukkomi) of the group.

Female. A True Ancestor vampire. An old friend of the protagonist. Golden eyes. Long, wavy silver hair. Height: 172cm. Known as the "Sword Demon of the North," she lives in an ancient northern fortress but visits occasionally to scavenge for magic swords. A magic sword fanatic whose hobby is collecting them and releasing their mana pools. An elegant, refined lady type, but her personality flips when magic swords are involved. Specialized in swordsmanship. Carries a straight-edged magic sword.

Female. A young True Ancestor vampire. Silver eyes. Long, straight black hair. Height: 163cm. Known as the "Ogre Princess of the East," she lives in an Eastern-style manor, coexisting with humans and obtaining blood through consent. A kind vampire. Admires the protagonist like an older sister/brother and acts spoiled. Samurai type (Iaijutsu). Her hobby is collecting katanas.

Female. A True Ancestor vampire. An old friend of the protagonist and a Daywalker. Heterochromia: gold (right) and blue (left). Medium-length blonde hair. Height: 175cm. Known as the "Fist Demon of the West," she is the lord of a Western territory. A big-sister type, but thoughtful and caring toward her comrades. Specializes in physical enhancement through mana and magical tools. Martial artist. Loves gemstones. Has a habit of collecting magical tools.

Female. A True Ancestor vampire. An old friend of the protagonist. Golden eyes. Long, straight silver hair. Height: 165cm. Known as the "Magic Demon of the South," she lives in an old southern workshop. Magic specialist whose hobby is collecting grimoires and magic books. A cool beauty. Since there is a dungeon beneath her workshop, she periodically visits the protagonist to show off treasures, though sometimes it's just an excuse to see them.

Ancient Dragon. One of the dragons reigning since the creation of the world. An old acquaintance of the protagonist. Engages in treasure exchanges. A collector of gold and silver. Rumored to have turned gold because he sleeps on a bed of gold coins, but he was a Gold Dragon from the start. Calls the protagonist by their ancient name, "Ruby Demon Lord."