1. There are cots and places for limited washing! The key point would be to not attract attention by using too much water at an unsanctioned location, so it would be strict. She wouldn't come back as a gremlin! It's probably pretty familiar to her from her life on Jakku when it came to cleanliness.
2. It would take a really long time, and it's not something that they can fill in a background for. We covered a bit about this here. While the atmosphere of the game has changed, the time constraints and limitations haven't, so we'd advise you to pick something more Earth-based for Rey!
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1. There are cots and places for limited washing! The key point would be to not attract attention by using too much water at an unsanctioned location, so it would be strict. She wouldn't come back as a gremlin! It's probably pretty familiar to her from her life on Jakku when it came to cleanliness.
2. It would take a really long time, and it's not something that they can fill in a background for. We covered a bit about this here. While the atmosphere of the game has changed, the time constraints and limitations haven't, so we'd advise you to pick something more Earth-based for Rey!