Whenever Touko-san took off her glasses, her manner of speaking was the first thing to change.
Previously, my friend Ryougi Shiki had a somewhat obscure dual personality, but this person called
Aozaki Touko really did change identities, as if flicking a switch. She said that it was actually her
personality and not her identity that changed, but from my perspective it didn’t really matter what it
was.
To sum up the Touko-san who had taken off her glasses in one phrase, she was a cold person.
A cold mode of behavior and speech, a cold ideology, and a cold reason; an image of humanity
formed from those sorts of things, that was Touko-san without glasses.

Kara no Kyoukai: The Garden of Sinners, Volume 5, Spiral Paradox 1 /5