Sayda

Sayda is a female Kumi-ho the party encountered in Episode 105, where she stalked them curiously for a time before they managed to elude her. 
The party was tasked by Hypatia to bring her Sayda's tail, in addition to a list of other demon body parts, in order for her to scribe a spell that would allow them to pass into the Court of Stars.
She appears to be, at least at the moment, acting as a sort of diplomat between Graz'zt and Obscura. The party found her schmoozing up to Graz'zt at the Dark Prince's party in Episode 108, though what her goal in doing so is remains unknown. The party lured her out of the party and attacked her, but the Kumi-ho managed to elude them by casting fly and jaunting to the ethereal plane.