At the mental prod from the TARDIS, he raises an eyebrow at her. Not telling Johnny that he's an angel in a completely reasonable precaution, as far as he's concerned, especially given how interested Zagreus is in the guy.

"I assume you two met in the dreaming? I met Johnny during the whole...Godzilla thing." He waves a hand, brushing away the importance of talking about Godzilla or the events of that day. "And he agreed to come live in my building." He smiles down at the TARDIS, then shift his glance back to Johnny. "I helped him discover his latent bisexuality."