Aah, that makes sense with Fox. I had assumed that Fox and El Shark were going to be more or less the "tutorial"/Starter NPCs and wouldn't appear past that, but if she's a long-term character then it gives more opportunities to build up her and the player. I kind of guessed it was supposed to be ambiguous, with an eventual reveal later. I was going to suggest some kind of optional shower peaking scene, like after the player gets the key from El Shark, Fox isn't downstairs, and if you go upstairs, the bathroom door is closed, with an option to peak through and spy on Fox. Though if you plan on Fox revealing her gender to the player later, a voyeur scene like this might not work, especially if she catches the player. I suppose a shower scene could later on, if Fox leaves the planet (speaking of which, is she going to ride-along in the player's ship, or rather just appear on her own on future planets?)
67 days ago(+1)
I actually like that idea, I could definitely add it in between that section where you get the key and then when you go into the scrapyard. You just gave me an idea for a day and night cycle. Certain things could happen at certain times of the day like the fox idling in the kitchen, showering, sleeping, etc.
And also I do plan on having NPCs tag along on your ship. Probably not in combat but for exploration.
67 days ago(+1)
Here's what I got so far; 
Still gotta make new face sprites but I'll probably add more little scenes like this! This will be a nighttime event.