We have this interview wherein some people from the localization team state that the fantasia is, at large, treated as a meta item - and that is why there's very little reasoning for the item outside of it's flavor text.Â
It all comes down to how you see the lore and how willing you are to bend it, using greyzones and questionable things. If you can find a headcanon that works for you, then it isn't like the world is going to end - but you should be aware that some people might opt to simply assume your character always were whatever race/gender you change them into as they might not be on board with a headcanon or fantasia use at all. You can get around that by simply not sharing the information easily, and if you feel like it is something that would naturally come up in conversation, you can always oocly whisper people first and ask if they're alright with you mentioning it. Don't take a no as a disapproval of your character - it's just really one of those subjects that split the waters so to speak.
It all comes down to how you see the lore and how willing you are to bend it, using greyzones and questionable things. If you can find a headcanon that works for you, then it isn't like the world is going to end - but you should be aware that some people might opt to simply assume your character always were whatever race/gender you change them into as they might not be on board with a headcanon or fantasia use at all. You can get around that by simply not sharing the information easily, and if you feel like it is something that would naturally come up in conversation, you can always oocly whisper people first and ask if they're alright with you mentioning it. Don't take a no as a disapproval of your character - it's just really one of those subjects that split the waters so to speak.
