Oh. first impressions are an interesting thing as they tend to heavily rely on the events leading up. But if I were to generalize them there are a few...interesting characters out there. 

Rico: Her general first impression for him would likely just be "loud" no matter the situation. She would likely actively avoid him if she wasn't payed to off him, in fear that he would draw too much attention to her. Both being rather vibrant red heads I am sure they would already draw too much attention just based on appearances alone. Annabell hates attention XD. 

Morgan: I have no doubt that the first meeting the two of them have will be on oposite ends of a weapon so first likely not good. Though [i]if[/i] that's not the case I am pretty sure she would just assume he is just another potential client looking to butter her up to try to get a better deal for whatever job he wants her to do. Very much she would be in "work mode" no matter the situation

Suiten: Anna would probably be super interested in her simply cuz, well, mermaid. Though personalities would likely very quickly clash, with Annabelle being more, reserved. 

Luna: I feel like mostly Annabelle would just be interested in Luna's bounty hunting. With similar was of making money Annabelle would probably serioulsy question Luna on how one doesn't just, take them in dead, all the time. Assuming Luna does actually take people in alive when she is bounty hunting XD

Haku: Annabelle would likely avoid Haku, and really any marine, like they are the plague. Being that her job is to most marines, rather illegal, any interaction had with him would be breif and nervous. Despite 'Deadeye' (at least as of now) likely not being too widely know among the marines she is still careful with them sooo.