Okay, this is my analysis of the voting options, do with it what you will:
[] "Friends, huh? Then I can take that as you not being my enemy? Sorry, I just have to make sure. I have a bad experience with body snatchers."
She will probably reassure us that she's a friendo, which means absolutely nothing, except for us revealing something about our past without her having to do the same.
[] You have a baaaaaad feeling about this one. Even Berserker seems wary of her. Make up an excuse and beat a hasty retreat.
I'm not sure she would let us go, and she has a Berserker. If she does, it's a little bit of a lost opportunity all the same.
[] "Hey Berserker, was it? Any advice here? Is this normal? She's looking at me weird."
Beowulf might not care that his Master is getting ridden like a meat toboggan upstream the river Styx. If he does care, well, she still resides in the body holding Command Seals. He would help us only if he cares about his real Master and we would present him with a clear opportunity to restore her.
[] "Friendly, aren't you? Is that really wise? We just met after all. Plus I didn't free you for charity, just dialogue between us. Though, this isn't that bad either."
Maybe. Establish you did what you did out of self-interest and don't care who she is as long as you can establish a working relationship. Allies of convenience.
[] "How... How much do you exactly remember, Miss?"
Again, maybe. Fish for the info under the pretext of getting to know each other better, but take initiative and get as much from her while giving as little as we can get away with.