Heart-Breaking? Is she permanently wheelchair-bound? Or did she suffer other injuries?

Eyes like that generally indicate either blindness or that their mind is just... gone. The lights are on, but nobody's home.

I'm thinking about mind break too. She doesn't show much emotion so I don't think blindness fits.

Gotta be temporary.

Who fried her mind and brain? Paptimus Scerulleancco?

Some Pixiv users speculate that this could be a what-if situation of Kaban losing her mind after being consumed by the black cerulean.