Grey Worm: Y-you are my weakness.

Missandei: That's what I am? Your weakness?

Grey Worm: When Unsullied are young, the masters learn their fears. One boy is scared of dogs, one boy hates high places, one is frightened of the ocean. They make the boy sleep with dogs or climb a cliff. They throw him in the water. If he learns to swim, good. If he drowns, good. Either way, strong Unsullied. But I had no fears. I was never the biggest, never the strongest... but I was bravest, always. Until... I meet Missandei from the Isle of Naath. Now I have fear.