Now, to comment on how Sabrina could possibly play a part in King’s situation since basically she is one of Dragon’s followers: At the time that King and Sabrina had their correspondence in the “Not All Dogs” arc, remember that King was deemed a third party or an enemy in this comic http://www.housepetscomic.com/2010/07/14/never-believe-its-not-so/ from “Dog Days of Summer.” So, in this case, Sabrina was not defecting, but just trying to help since at the time, King was not acting as Avatar to Pete. Tarot/Dragon could not interfere personally, (see link above) so Sabrina was probably sent by Tarot to alert King of what occurred.

Until King agrees to be Pete’s Avatar or otherwise, King is just a third party, not linked to Pete as an Avatar or anything, which would explain why Pete broke into Heaven to snatch Joel/King’s Fate/soul to perhaps force King to comply once again, but as it stands presently, King is just King right now, and Pete is still desperate. Does that make sense?

I would also offer King the choice of either becoming human again and washing his hands of the whole situation, or to remain a Corgi and become a Dark Paladin as an independent agent. The second option gives King the option to either ignore the Game and his new powers, thus living a normal Corgi life, or to go out of his way to make Pete suffer.