Sweet And Sour Shoto Todoroki X Reader

Todorokis childhood friend disappeared and then appeared years later at the same high school, U.A high school. At the age of 6 (Y/N) generated a quirk that lets (Y/N) manifest shadows - her shadows do things other than burn, she can transfer everything on her mind into another persons head, it's good but bad because she can't control what she says to them but it's good if she can't talk or just doesn't want to- on her right side and light on the left. -The light can heal light wounds anything worse than that and it takes it out on (y/n)- While using her quirk hey black irises have the inner ring turn red. People call her Sin for her looks but (Y/N) likes her name a bit better so she doesn't mind that much about the nickname.