“Sis – what the hell was that?”
“What?”
“Don’t josh me – you couldn’t possible have strung together all those moves. There’s no way that you have the energy for that. In your condition – you’re not hitting anyone two hundred and seventy-two times.”
“Oh, that.”
Nanami nodded.
As if she’d forgotten.
“I can see why you’d have your doubts – even with eyes like these, I can’t make myself healthy on my own –“
“…”
Nanami Yasuri had a feeble constitution.
She lacked both energy – and stamina.
The sole blemish to her genius.
Her sole weakness – or so it seemed.

Katanagatari Omnibus 3, Page 22