Considering that he's lived that kind of paranoid for a long time? That's fair. He just tragically realizes in that instant that he'd actually let go of his paranoia. Considering Vegeta and Freeza he can't fault Conan his nerves. When you got a history with someone it wears you down.

"...We talkin' illusionist or sorcerer?" Which is a valid question to ask, considering the setting. Not that it matters too much.

"So... she knew your mama by happenstance but was involved in this big organization. I guess it's all mostly her and your business but what kinda stuff should I expect?" Though now he figures he doesn't have to worry outside of being Conan's roommate. That's mostly Conan's concerns and he's never asked for help. He must be pretty sure he can handle it.

"You ain't warned us about her so I gotta figure you think she can control herself."