@vexelpops why would you call her a bimbo just because of her looks when she was proven to be one of the most clever female character from the whole manhwa?
Also, I don't see where you saw her trusting him for "no reason". She met him on multiple occasions, and his servant Rain came to her house multiple times. So it's not like he is a complete stranger, she knows he isn't as sketchy as she first thought. Despite that she still went to the meeting literally saying "if it goes bad I can use my hourglass", so she was clearly wary of him and didn't trust him yet. He didn't show any hostility during the meeting, was attentive to her ideas and was open minded enough to listen to her despite the fact that she's a woman. Of course she'd start to trust after that, their trust relationship was slowly built throughout multiple chapters of interactions.
I don't think we've read the same manhwa if after all this you think she's a "bimbo" who "trusted him for no reason".