>>724868249
Tetra very, very, very explicitly is just tanned because she is out in the sun sailing the seas, which was a good opportunity for Nintendo to make her look a bit less like Zelda and have something resembling a twist.

And the reason she loses the tan is because Triforce activating = genetic memory manifesting, which in her case means pale princess in a dress who doesn't spend as much time in the sun. Ofc she could also be subconsciously using some magic like how she did it in OoT.

Anyway, Sonia is probably a reference to it or a subtle way to tie it together. Sounds silly but tans aren't unimportant in Zelda.