[Compared to some, Castiel had managed to hold out for a while before one of the roots had gotten to him. It's only on the third day that he's caught by surprise, that his angel blade isn't enough to fight off one of the plants when it comes creeping forward.

Now he's in the exact same shape as the rest of the mansion, though Castiel's shared a body with someone else before. It's not the same, seeing how Jimmy (and any other vessels he's taken) had been more or less unconscious the entire time. This Mirror, on the other hand...

On top of being a part of him, it also becomes clear what part of his life it's meant to signify when the presence in his mind introduces itself as Emmanuel and starts asking question after question. Castiel's managed to ignore the buzz in his head, though, and eventually his Mirror had quieted down, but now he has an idea of what everyone else is dealing with.

Which also means that he's now capable of being of some help, beyond simply trying to keep the roots under control. That's a losing battle no matter which way he looks at it.]

[So Castiel does something rare and records a message of himself on his phone, broadcasting it to the rest of the mansion. His expression is as flat as always, but there might be a hint of grimness to it for anyone who knows him well enough to pick up the subtle differences.]

I haven't had much interaction with the Mirrors myself, but I've heard enough to understand how dangerous they can be. I think I may be able to offer some assistance.

[His gaze drops down to his hand.]

This is untested for the moment, but it's possible I can disable its consciousness in your mind, to give... if nothing else, a small reprieve. If you're able to arrest control for long enough, you can contact me and I'll offer whatever help that I can.

[The feed shakes and tilts as he moves to turn it off, but then he pauses, remembering something. His face appears again, though slightly closer than before, and off-center.] For those who don't know me, my name is Castiel.