Jensen is a donkey. Well, a donkey with an odd inheritance. Apparently his family was cursed in ancient times, so that every 5 generations, a child would be born a monster. The type of monster is unknown, but it can be best described as a "dream ghoul". Some might even call it a "Jinn".

Jensen has never been able to eat normal food without his body rejecting it, he has to rely on eating and drinking the blood of other sentient people, something he's not really fond of, but has to do anyway. His body works differently in that, instead of functioning organs and blood, his body is made up of nothing but flesh and bone that repairs itself with the flesh and blood he eats.

This curse isn't all bad however. He has a small level of psychic abilities, namely small level telekinesis, and a limited ability to alter one's perception. Simply touching someone's head with his bare hands causes them to hallucinate, disorient, or simply faint.

The more starved he is, the stronger his psychic abilities, but also the more desperate he becomes, making it hard to control these stronger powers properly.

He's also part of the same universe as this guy:

His Toyhouse Profile