Who would've known that a mortal would posses such an ability? That is, the ability to manipulate one's own soul. You know, the important thing needed to strike a deal. That deal being a soul for protection. Well, Domino didn't. And that's why he's at the Wolf Zurkus, stuck with that bastard harlequin, that cheating, soul replicating bastard Papi. And his rugrats. Some good, some he'd send to the underworld in a heartbeat if he could. In case you don't get the memo: Papi struck a deal with Domino. When Kedamono assumed Papi left because "his face was his mother's" he was auctally getting protection from the malevolent white wolf. His soul, the circus and it's inhabitants' protection. Of course, the man found a way to cheat the system. So now, Domino is stuck at the Zirkus with no escape, not until the man unbinds him from the hellhole. He keeps a human disguise when wandering the Earth, but was suprised to learn that no one at the Zurkus found him odd in anyway...so he dropped it around them.
As for Onimod, she willingly came to Ipap, knowing the woman would leave to travel very soon. She knew of the terror that would befall them, should Onomadek ever stray away from her father's image. So, while Ipap is away travelling, Onimod's watchful eyes lay upon the Zurkus. She loves the Zurkus, and treats it's inhabitants' as children she is mothering, keeping the more unruly ones in line. Everyone knew from the start she was an angel. Isn't it obvious??