Yakumo Rio

She is the grandson of the boss of the "Yagumo Group."
She has one younger sister.

Her parents died shortly after her younger sister, Miyu, was born, and she was taken in by his grandfather.
Following the boss's policy, she was raised in a way that had nothing to do with the world of the group or its customs.

When she was young, she didn't really understand what it meant to have her grandfather as the boss, but now she understands and is grateful to her grandfather for trying to raise him normally.

She has a bright and positive personality. People tend to shy away from her at first because of her family, but she can get along with anyone when she talks to them. She
is fairly good at both studying and sports.

Her dream is to become a nurse when she grows up, and she admires Kyoko, a nurse she knows and lives nearby.