Kuga Rin

She is in charge of monitoring the movements of the main character, who is sent to the school as a teacher, so that the Nishiki can keep track of his movements. She is ordinarily enrolled at the school as a student and blends in well with the students. She has an affable and friendly personality, and is a good communicator who can make friends with anyone. Although she is a woman, she is a trainer of females and is already an accomplished professional in her field. She falls in love with the main character's skills and volunteers to be his apprentice.

Translated from the official site