Mostly, I'm not a huge fan of starting off with a character introducing themselves, although based off your other books I'm assuming this is for a younger audience, which might make it more tolerable. On the other hand, you've already given us some quick insight into who this character is. At first, I was taking her claim of being a space adventuress as face value, although now I'm wondering if it's more a kid with a vivid imagination.
Here's my catch:
The room beyond was large enough that the scope of the crystals couldn’t catch the edges, but from the way Marei had spoken, Lara didn’t think it was likely to be much more beyond that. The ceiling was taller here, and multiple columns invaded the space as a means of support. Otherwise, the room appeared empty. Precursor architecture always tended toward the large and not necessarily practical. As she stepped forward, Lara felt a tingling dance momentarily over her skin. She frowned, searching for the source.