Cavallah is a rogue. She's highly skilled at Bluff (Deception) and she's running a criminal organization. If I were to pick a fiendish root that would lend itself to a love of intrigue, I'd say Eldrantulku. With that said, keep in mind that the oni are bound to lesser fiends. It's not that she has a direct connection to Eldrantulku, it's that the incubus Usalar—also known as the Treacherous Blade—is bound to her blood. Usalar is a child of Eldrantulku, a spirit of cruel deceit. Even then, he's TRAPPED in Cavallah. By default, she doesn't speak with him or work with him; but his power is in her blood, granting her supernatural abilities and providing her with instincts that make her an exceptional deceiver.
Source: May 2024 Q&A