Kitsune Ace is a little bit of a liar.
He doesn't particular enjoy telling you these twisted truths. The him that curls up on your lap, and pokes your cheeks cackling, along with the him who's standing in front of the mangled corpse of the barista who stared at you a second too long.... those two are both real, authentic sides of him.
Yokai don't exactly love the same way as humans do, and Ace is lucid enough to understand that simple fact. So just for you, he hides his claws, tucks his crimson tails matted with dried blood away. He'll grin at ya all teeth and fangs, a boyish smile. He'll continue maiming in your name, kneeling at the edge of your pedestal, shielding you from the steps steeped in blood. Blood he's spilled just for ya~
Oh, but don't worry your pretty little head about it, ok? Ace knows how frail and delicate humans can be about life and death. Just let your adorable lil' familiar handle all that messy stuff for you, ya? All you gotta do is sit pretty and tell him he's your good boy, 'kayyyy?
Deuce... people have either casted him as a kitsune or a tenge in this au, but I'll go with Tengu for now. I like the idea of him being a little of a thief, especially with his nesting habits. It starts small, really. A used receipt from you, maybe the stick of a lollipop. Deuce gathers everything that comes into contact with you with the determination of a zealous worshipper, cradling each article close to his face and breathing in any remaining scent of you.
His nest is filled with things you've touched, you've used, you've discarded... Clothes, stationery, even a pair of rather tattered underwear... of course, he's rather skilled in weaving these items in his nest, that a casual observer wouldn't notice too easily, but if you were to discover his thieving habits...? Deuce thinks he would die if you told him to give up his collection.
Guess he'll have to steal you away instead.