He would have to be adoptive first off, because immortal children are illegal and his power could be either something like these- Freezing things at the touch Lowers energy Fear illusion Or even force field Hope I helped
It sucks
He could be an empath. Like experiencing other people emotions, sort of channeling them. Sort of like mind reading but with people's feelings instead. Like phoebe from charmed. He could also be able to take emotions away or add them to a person, maybe to make grief easier or cheer them up whenever he wants. A good one would also be that he could see the future like Alice, but maybe clearer than she can; his visions would be exact. I hope I helped a little bit! Good luck
Um why Twilight. Watch a good movie like Batman Dark Knight Rises or something. I heard the Twilight books were ok. But still MEH...