It’s kind of funny but when I reread this chapter, this question suddenly popped up in my head. It’s probably one of those things we only notice as adults?
In the next pages we see Kuon breaking free of his own mental prison while Kyoko’s image as a child seems to shatter.
I think it’s another symbolic display of his emotional change, likely at this point Kuon stopped treating Kyoko as the child in his memory but as a more grown up person.
The question remains whether it’s due to her kiss of salvation (?) or because of… Just a thought
