Zeygent

Agent spent way too long with Zeydaan in their dimensional inbetween. An itch, burning deep into their soul would begin to fester. Zeydaan is and can be anyone or anything in certain realities. If you soak in all that energy over time, what do you think would happen when you then go to a reality where Zeydaan is in the form we all know them as.

Zeydaan, or Isabella's magic is already finnicky and leaves them stuck in forms herself- so what would happen to someone like Agent?
Their body morphed from all of the magic- even inheriting some form of control over it. More often than not, some may have some fun with the canid form they would possess before turning back to normal using the same magic that got them into this mess- but who's to say Agent wouldn't make this new form more their own.