Istredd feels Wanda's presence and that cuts off what he might have been able to say, glancing toward her. He is aware now that Wanda is friends with both of them, Lucifer admitted to caring for them both (how embarrassing), so at least he doesn't have to be worried about an awkward introduction. Which he would never mind doing with these two, but this does make things easier.

"You are welcome in any club we're a part of, I wager."

He isn't going to focus on filling the new alchemy book he had in mind when there are two people to talk to, so he closes it for now, focusing on her. Ah, so she did go to the party. Istredd hasn't tried to sense who was there, it seemed like flirting with disaster.

"If you came here to get some quiet, we can pretend you're not here."

He smiles faintly; as a fellow introvert, it's the least he can offer.