great characters are gated behind male only fking. Especially if they're crew (Ramis)
FYI, you don't even need to fuck her, you just need to go drinking with her on a bender as a male, she states you two
probrably didn't fuck (and indeed the stats also show you remained virgin if you didn't fuck anyone yet) so you don't have to fuck her.
Yes absolutely the horror especially as one is crew. Kinda pointless having her aboard.
Absolutely not, Ramis is a Gun-Crew so she can manage the Missile Bay turrets, arguably the strongest weapon of the entire game, having her rather early on is pretty good once you get the turret, and as other mentioned, she trains stats, actually I am fairly certain she practically raises almost all stats outside of Inteligence.
Additionally she is a real fast method to increase Alchool Tolerance (going on a bender with her for like 4 days straight practically gives you complete tolerance)