Ouma Shiho

President of the main character's class.
In her role, she does not let Rei bully the main character, but only stops her out of courtesy, and thinks that the main character's attitude toward being bullied is problematic.

In fact, she is a wealthy young lady of a zaibatsu group.
She has been married to a man since she was a child, but she hates men, and she obeys her parents, believing that marriage is the only way to protect her family.
She has been a childhood friend of Rei and the main character, but they have been estranged since elementary school.