Zombie!Verse: Rhia married Conlan right before the zombie outbreak in this timeline. She's still alive! Surprisingly. Since the school has been overtaken, they went underground... Morlocks?! xD I have no idea. Cas!Verse: Since this sounds more like a utopian AU, I think Rhiannon managed to become a world famous writer and maybe even came into her own, power-wise. In line to be the next Sorcerer Supreme?! :O Maybe she even found time to get settled down and popped out a kid or two?