Kacha Pesh was found in the wilderness of Starfall, a feral child with no story or explanation. He came out of the swamps and into Lagan Hane, and from there he was sent around the world. Kacha Pesh is perhaps unique--no prayer nor spell nor void has ever affected him, no matter how powerful. It simply does not work. He speaks only in denials, save to tell people he is called Kacha Pesh. He looks human, but his hair and eyes and nails are fuligin in hue.
Nuox' Iquidrian met him in a Temple of the Voidfather on Merukis, and for reasons unknown, the two have been inseparable since.