Devils in the Nentir Vale
Cousin Reginald wears feathery, flowing outfits with much jewelry and ostentatious displays of style. He carries himself lightly, almost prancing, and affects to smoke a long cigarette with his right hand stretched way back, as though to touch the back of his arm. He has a high pitched voice and laughs as though it were completely faked.
Update: Episode 12
When the party returned from procuring the goblet of eyes, Reginald revealed himself as a wrathborn devil. He had merely been disguised as a foppish twit to get others to underestimate him. He managed to grab the goblet of eyes and used his Burst Skyward power to escape. His current whereabouts are unknown.