Decided on Jacob's Fae appearance - his skin is almost completely white, eyes bigger and a bright green, hair longer and blacker, while he's almost completely covered in black feathers, has clawed hands and feet, and giant wings, strongly based off of Howl from Howl's Moving Castle.

He's a thieving Fae - you want something stolen from someone else, be it a possession or physical attribute, he can do it, but the payment will be something taken from you. And that something will not be outlined before he does the deed.