So, I have to say that my favourite character is Maruk. What I like the most about this kind of character is that you can be sure that you won't have any bad surprises with them. If they have something bad to tell us, they will tell us straight away, unlike some characters who might lie or hide the truth. That's the advantage of being straight forward and direct I guess. I kind of relate to the fact that he's paranoid about security. I mean, the MC is an alien who literally comes out of nowhere. I can totally understand him being on guard. He probably lacked empathy but I don't think that's his intention. Moreover, he's not helped by the conditions (Seriously, having to stay in the same room all the time even to sleep is not very nice of the team when he's the one who retrieved the MC while not making a scratch on his memory. He did his job well and he's being punished. Poor Guy.
As a previous comment said, I think the doctor will become an antagonist. He made a good first impression on me but the longer the game went on the less confidence I had in him. The fact that he always keeps a blank stare is also quite creepy. He looks like the kind of person who will do anything to sacrifice lives for science with an "end justifies the means" logic. I wonder what role the captain will play. Is she his accomplice, his boss or does she have nothing to do with him? I'm very curious to see her and to make my opinion on her.
As for the pace, I personally don't mind it. I played the game a couple of weeks ago so my memories aren't very fresh but I don't think I remember being bored at any point.