吉佐喜 由里香

She is the heir of the Yoshisaki Group, one of the world's leading conglomerates. She was raised by strict parents , and is strict with both discipline and education, earning the trust of her teachers.

She trusts the protagonist, an honest teacher, and is on friendly terms with him.
She is insensitive and does not notice the jealousy of her friend Rina, who has feelings for the protagonist.