Casper has no recollection of his past life. When he was young, a Cult had taken him because of his unique gift. They tortured him. The leader had labeled him a "Demon", using his birthpower as a means to make him a tool to boost the leaders own status, just because he existed with his power. Of course, to permanently boost it, this cult leader planned to kill Casper himself. But, somehow, at age 5, Casper escaped. He ran, and ran. And he kept running. But this cult leader, and his followers, they were no ordinary people. They were rich elite. They had ties everywhere. Casper, however, despite being on his own, somehow managed to survive, obviously using his gift.
He was born with 3 powers. All of them connected or similar in a way. First off, he can absorb energy from other living things. This energy can heal him, help him make weapons and tools of pure energy, and while draining energy, he can make them KO for being too tired and not enough energy. The next is that he can transmit energy into other people as well. This energy can be used to heal others, make their powers momentarily stronger, or sometimes he can use it to make them much faster, stronger, and more observant Finally, his third power. Normally, the third power would be some big one. But it isn't. His third one is that he can regenerate energy on his own. Nowhere near as fast as when he drains energy from others, but its something.
He typically wears clothes that will keep him from standing out in a crowd, like just some sneakers, a vest, shirt, jeans, and his backpack that he keeps under his vest. Everything he owns is either in his pockets, in his backpack, or is what he is wearing. He has never really found a place to settle. Which isn't much. Just a few knives and weapons and such for defense, a good amount of food, some water bottles, and a few notebooks. Those notebooks are about the only indication of his past, where he has been, what he remembers. They have been his solace and friends. He has never once relied on anyone else.