It would be really nice to be able to change the way my guardian looks at anytime under their helmet & gender instead of it being that one time only at the start of the game for their guardians. Why is it we can never change things about them like their hairstyles and other features of them at any point after accepting our guardian's appearance?
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Because they want you to identify with your Guardian instead of seeing it as a doll that you can manipulate at any time and in any way.