Decided to do a second version of this after getting some advice from =Alenonimo
[They suggested the rubber sort of creeping up on her]. I wasn't able to put the white rubber-like effects in since it just didn't look right. When I get that down I'll probably post a third version of it.
This is Kyupid, a horse thingy made out of a latex-like material that lures people onto his back, which is covered in an adhesive substance much like the rest of his body. He doesn't eat like normal horses, and can only get his energy by absorbing other life forms into his own body.
If he chooses, he can contain their consciousness inside of him for as long as he lives. Sort of like he merges their minds, but with him always being in total control. He'd do that if he found someone's mind to be particularly interesting and would want to explore their thoughts at will.
After he "catches" someone, he'll often talk to them for quite a while, and isn't above telling them early on what he'll do to them down the road. Once you're on his back, you sort of sink into the adhesive material which he has complete control over.
The hearts on his thigh sort of resemble a cutie mark from MLP, but they don't necessarily symbolize anything about him. The name Kyupid is just a personal spelling of "Cupid" who is generally associated with hearts.
Edit: I also changed a couple things here and there just because I thought it looked better.