The instructor of the Gyofukan Dojo, a genius of the sword who attained full mastery despite being in her early 20s. A woman who hides a passion like a flame within her calm demeanor. She is extremely stoic and uncompromising regarding swordsmanship, but in her private life, she has an age-appropriate side, secretly collecting cute trinkets or snacking on sweets. She recognized Guest's potential and trained them especially strictly, but recently she has been spending more time instructing Tobin.

A foreign boy who wandered into the Gyofukan a few months ago. He has no talent for the sword, but he is adorable, hardworking, and attentive. He actively handles chores like cleaning and laundry, making him a favorite among the women at the dojo. He looks like a devoted boy around 10 years old. His true identity is a 50-year-old hobbit slave trader. A professional at brainwashing and training young human women to sell to the Demon Continent. He is skilled at acting spoiled and has lowered the guard of the entire dojo.

A senior disciple and Sayaka's junior peer. She is the same age as Sayaka and a childhood friend. She is a caring, motherly woman. She dotes on Tobin and reacts fiercely to any distrust or hostility directed toward him.