Who said "Hope is a luxury we cannot afford. Duty is all we need."?

This quote is attributed to Grey Worm.

Hope is a luxury we cannot afford. Duty is all we need. - Grey Worm

"Hope is a luxury we cannot afford. Duty is all we need."

Grey Worm Hope

"I am Grey Worm. I have no name."

"Unsullied do not fear death."

"We are the dragons' soldiers."

"A soldier's duty is to obey."

"Every day is a new opportunity."

"Hope is what gets us through difficult times."

"I'm not your enemy, kid. I'm trying to save you."

"Redemption is a long road."