yeah he looks like a male kenyi to me. but a sick one at that-id take him out and put him in another tank if you can so he can heal. if you dont seperate him, they will just pick on him til he dies of stress and injuries. Keep in mind, once that kenyi gets some size on him he could possibly be very aggressive. i had a female and she was the worst fish i ever had (she was a bully) and she would chase everyone NONSTOP all day until she was exhausted. then she'd start all over again. i had to take her out of the tank..
if you dont have a large tank for him ( eventually he will be aggressive-but then again every fish is different) i would hospitilize him then get rid of him.
How big is the tank? and what are the tankmates ? and how many tankmates?