Who said "The cost of peace is sometimes war. Remember that."?

This quote is attributed to Brienne.

The cost of peace is sometimes war. Remember that. - Brienne

"The cost of peace is sometimes war. Remember that."

Brienne War

"I am no one's daughter now. I will kill the men on my list."

"Nothing's worth nothing."

"I'm not a lady, I never have been."

"Renly was a good man. I would have died for him."

"Some battles are worth fighting."

"Sometimes you have to become the monster to stop the monsters."

"Skynet sent me back through time to kill you."

"War teaches us the value of peace."