Zoe's eyes mistake, rito

It's called heterochromia. It's pretty rare.

I like to think that she's able to somehow switch the colors as she likes, she can basically do anything.

taste the rainbow, be the rainbow

Little fun fact. The eye color in the splash art used to be swapped on the pbe (even at the pool party event announcement for a short period of time). I guess they fixed that but missed out on the loading screen.