Okay, so this person is 21, they honestly do not have a lot of history to them. I'd like some more explanation on who they were, came to be, and how they came to be what they are now sort of thing. Doesn't have to be overly long, but it's kind of short right now and feels a little lacking. I need to know more about who this person is and where they came from. Literally, what happened in the years following her parent's death?
My next point on this person is, regarding her history, one parent just left her, and the other got killed. There needs to be a lot more explanation on this point and the way it affects Alcyone. This would likely go into her weaknesses if she has any resulting trauma from it, which she likely does, as well as into her behavior for how she copes with this and life in general.
Second point: I know it can be hard to find dislikes for people and they generally show up as the character progresses, but having some to start with helps define the character, not to mention gives you some interesting interactions in RP when you run into the character's dislikes, be that people, places, or things.
Third point: Expanding on the dream. What makes her want to explore the universe? I didn't get this one. Is it something that developed from her history or just something she's always wanted to do kind of thing?
Fourth: You did not fill out the sample RP post.
If you could fix and adjust these, that'd be cool.