Neoraot, is a Skeever who was gifted intelligence when a dremora's soul was bound to his, brought about by a mage living in a remote dungeon southeast of Falkreath
He's a thief and a shady merchant, he's fat, diseased and fairly rude, he will swindle you out of your Septims.

He got that amulet around his neck off of a draugr, he doesn't just stick to skyrim, and he scams people with his faulty products all throughout Tamriel.
The soul that was bound to the skeevers is that of a Dremora Valkynaz.