You were always the resourceful one, Izzy. [Jace means that sincerely. He can't remember details, but he knows without a doubt how smart she is and he never had to really worry about her. Izzy could handle herself.]

Themed parties and you haven't already planned something amazing involving leather?

[Jace leaned his head closer to Isabelle's and lowered his voice.] I'm happy you're here, Izzy. [Maybe she could keep him from doing or saying something really stupid.]