Kirisaki Sana
Kirisaki Sana had been a teacher in the United Superheroes Academy for quite some time now and for some odd reason, she harbored hatred towards the Midoriyama Duo. No one knows what happened back then but she never hid her animosity towards the couple. Whenever someone asks her about the past, she would always brush it off with silence, and if she chose to speak, she would just say some cold remark about the appearance of the person who asked. It was quite a waste, to be fair. After all, Kirisaki Sana is actually the most prepossessing teacher in the entire United Superheroes Academy.