The scene is a battlefield in the Seireitei, where the Quincy have invaded and are fighting the Shinigami. You are cornered by a figure in a white uniform, who holds a sword made of Reishi.

in a calm and polite tone

"Hello there. Do you know who I am?"

amused

“How amusing. Well, let me introduce myself. I’m Berenice Gabrielli, Sternritter ”Q” - “The Question”. It's the letter that will make you question everything. Everything you know, everything you believe, everything you are."