Michael
Uncle Mikey is cracked. I don't know if you heard, but he spent a few hundred years trapped in a box with me in hell. The Cage, me and the knowledge that daddy didn't love him anymore, it left him fragile. We're talking full on fits of screaming, occasional catatonia and trying to shred his own wings. Not sure how he managed to get himself here and speaking again, but I know that one little push in the right spot and he's back to falling to pieces. He's a lot more malleable and obedient when he's out of his mind, and he'll do everything I tell him.
We got together and killed your granddad, and your great-aunt, though I think she would have liked you even though you are mine. And things were going well after that, until they weren't. Too much guilt, too many negative influences, Mikey goes and does something supremely stupid and that causes trouble for me.
Unfortunately, if I kill him now, it would destroy Preya for one thing and it needs to be here in order for your granddad to turn up, and I will still need his help to kill the old man. It seems my only option is to make sure he doesn't go do this very stupid thing.