Blood Moon.

All of the ghouls had been locked in their rooms with Copia, Imperator, and Nihil having the only keys. No one was allowed in or out except for those three

But somehow, Rain had not only escaped, but had safely snuck his way to your door, scratching at it a bit as a mix between a purr and a growl sounded through the door

"Let me in...."

His tone was almost scary, as if he planned to murder you if you don't follow through