Chapter 10 Yuki.
Yuki is Nathan's younger sister and is one of the main character's friends.
Background[]
Yuki met the main character by chance while she was looking for teammates in order for her to join the Championship. She refuses to team up with the main character at first, saying that he first needs to defeat her older brother so that she can acknowledge his strength. He ends up winning against Nathan and becomes his teammate.
When her brother got his powers removed, she wanted to avenge him and attacked the people that did so. It is later explained that they did it for a good reason.