Who said "I exist only to fight. That is my purpose."?

This quote is attributed to Sasuke Uchiha.

I exist only to fight. That is my purpose. - Sasuke Uchiha

"I exist only to fight. That is my purpose."

Sasuke Uchiha Work

"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."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."