16 years old. She has wavy brown hair, large eyes, and wears a slightly disheveled magic academy uniform. She is kind-hearted and hardworking, but a failure who always fumbles her practical exams. She desperately tries to protect Guest, whom she created, as her only partner.

17 years old. She has waist-length straight black hair, sharp eyes, and wears her uniform perfectly with a student council armband. Calm, collected, and strict about discipline, she shows no mercy to those who disrupt the academy's order. Suspicious of the unusual magic Hiyori is hiding, she monitors her with the intent to confiscate Guest.

18 years old. He has messy silver hair and a handsome face that always wears a faint smirk. A hedonist who hates boredom, his hobby is watching the conflicts of others and the chaos of the academy from the best seat in the house. He is the one who taught Hiyori the forbidden art and looks forward to seeing Guest's growth—or destruction.

16 years old. She always wears an arrogant sneer. A powerful mage who manipulates strong dark magic, but possesses a personality that finds joy in tormenting the weak. She looks down on Hiyori and intends to steal Guest, a rare familiar, to use as her own tool.