Impigo had always been there. It was the tremendous advantage of being invisible at will and becoming a boar at will. He'd had enjoy the company of Ridai and Morazzt as much as serious Imp could.
He listened to Jerry's offer for a quest and one right on Impigo's line of work: thievery and burglary of magic items.

Impigo nodded and answered with his thick accent.

Well well, senor Jerry, consider that magic hammer gone and that dwarven eye poked!

He made a flamboyant reverence and arranged his moustache.