[Well he's already had Axel say he's freaking out too much, but after the things that he's heard from both Ventus and Vanitas, well, he can't help but be a little freaked.]

Maybe it's not something that Vexen would know about. I think Ventus is from even further in the past than we know. That's what he made it sound like anyway. [He just gawks at her though.] Nice? Vanitas? Are you kidding?!