Alex didn't know about the perks of being a vampire, so she couldn't comment on that. But since Klaus seemed to breathe like a human would, she figured that he might not be immune to the poppies effects either. Supergirl hadn't been, and a lot of others. Shepard was though, sort of, because of her suit. So that was one person who could help them all out if need be.
"If I put my life on hold every time there was some kind of catastrophe, I'd never get anywhere," Alex said. She liked staying busy. She needed the routine. It might have seemed completely mundane to someone else but it helped Alex to keep her sanity. When that routine was disrupted, she had a hard time with it.
She knew what he was here for and hoped he'd just get on with it. She had things to do. And she planned on staying away from the Excalibur, but she thought she could probably handle it if something did happen. She was stronger than she looked, and a fighter.