She's fairly high-confidence that this was, overall, a good idea.
Assuming Dean Mesmerra wasn't lying--and after the power she displayed, she might as well assume that, since if Mesmerra wants her to believe a thing she can demonstrably arrange it--she won't be in danger for her life, here. At all. Being under someone else's control is, well, it's not like that's not de facto the case for all ninja anyway, except maybe Kages.
It would be nice to only have to answer to one person, and to be able to choose that person.
But if she wants to have the chance to choose instead of having someone else take the choice away from her, she can't let down her guard.
She steps into the room carefully and surveys its other occupants.