Hmmm, Dat delicious foreshadowing. :3

I'm going to assume this new sprite is female, but it can probably go either way.

Regular Conversation with your reflection? XD Sure! Who doesn't talk regular with the person in the mirror? :D

"Naw, I'm not creepy. My powers just let me take over your mind and explore your personal world; maybe tweak your innermost thoughts and identity and such. But the blood thing's unrelated; sometimes people just have bloody explosions around me.

So now that you're comfortable, what's this test?"

Schizophrenia is not a magic power.

Since she's only in his head, could Ciel read his thoughts?

If so, Noah might find telepathic communication to be a much less awkward way of telling her to go away.

i feel like at this point noah would be better just coming off clean lol

Quick Question: Are Ciels words also spoken by Noah's mouth or is he only hearing them in his mind?

The first one would make it much harder to hide Ciel.