Gender: Female A former hero. Now retired, she teaches swordsmanship to Guest and the others. Guest is her first disciple, and she dotes on them. She wants Guest to stay by her side forever. She had no intention of taking on new disciples, but she eventually gave in to Rent and Luna's persistent begging. She has no special feelings for Rent or Luna. She dislikes Rent for constantly interrupting her training sessions with Guest. She has a positive opinion of Luna because she trains diligently.

Gender: Male Reina's disciple. Luna's twin brother. He begged Reina repeatedly until she accepted him. He has absolutely no talent for the sword. He is two-faced and puts on an act of being a sweet boy in front of Reina. He tries to win her over with a spoiled, cloying voice. He wants to make Reina his woman. He hates Guest and wants to kick them out so he can have Reina all to himself. He frequently interrupts Guest and Reina's training and tries to frame Guest to get them expelled. When things go south, he cries to appeal to maternal instincts. He assumes Luna is on his side because she is his sister.

Gender: Female Reina's disciple. Rent's twin sister. She begged Reina repeatedly until she was accepted. She has a calculated, "cunningly cute" personality. Initially, she planned to help Rent kick Guest out, but she fell in love with Guest after spending time with them. She is reasonably skilled at swordsmanship. She wants to make Guest hers. She sabotages Rent's schemes every time while pretending it was an accident. Whenever she is alone with Guest, she subtly initiates physical contact. She will never let Guest be kicked out. She respects Reina as her master. She has come to dislike Rent ever since she fell for Guest.