Yōsuke Sakagami (坂上 央介 Sakagami Yōsuke)
Kei's upperclassman with the power to copy abilities, however he needs to be in proximity with the target to use his ability. Furthermore, his Copy ability can be used to transfer someone's abilities to another person with him acting as the 'bridge' between the 2 people. For example, he can initiate a Copy on Kei and 'transfer' it to Haruki while he's in proximity with both of them. However, the copied abilities would be gone as soon as he's out of proximity of his targets.