Charlie nodded. "Alright."
He actually had no reason to receive Kathleen, but the reason she had suddenly decided to come must be because of him, so he naturally had to return the favor.
Yoshitaka then turned toward Tanya and Trevor, bowing his head apologetically, "Excuse us for a moment. I'll be sure to introduce you to Ms. Fox, too."
Tanya was well aware that Charlie was Kathleen's friend and not hers, and she really shouldn't try to join the reception to look chummy.
Smiling and nodding,