Who said "To kill you, I would become a demon."?

This quote is attributed to Sasuke Uchiha.

To kill you, I would become a demon. - Sasuke Uchiha

"To kill you, I would become a demon."

Sasuke Uchiha

"I am an avenger."

"I don't care about anyone else. I only care about my own power."

"You are my favorite person to fight."

"I'm not interested in anything that doesn't involve becoming stronger."