In retrospect, it would’ve been cool if Shiver DID have heterochromia. Since I feel as though Shiver’s colour pallete represents the Nintendo Switch, she could’ve had one red eye and one light blue eye. She could even refer to them as “Switch eyes” or maybe “Eyes full of joy”, referencing the Nintendo Switch joycons. Plus, while the “Eyes full of joy” probably wouldn’t seem right for Shiver, it would’ve fitted, as despite her dark appearance, she is actually really goofy. The term “Eyes full of joy” coupled with her slightly crazy personality would’ve been so cool But hey, Shiver is already pretty cool the way she is
