His next teacher has a deep, rumbling voice, like the feeling of gravel beneath bare feet. His hands seemed even rougher than how he remembered his father's, but would teach just as much. If not that, more.

His lack of sight is a disadvantage, the man tells him, but it can be turned into an asset. Most enemies can't function in the dark during a fight. Learning to recognize the sound of a fist, knife,

or bullet is easy, but dodging one is harder. He learns to observe, but not with his eyes. (Footsteps to the right, slightly deafened, boots. Heavy steps, about 200-250 pounds, male. Combined with boots, probable body armor.)

After that, he learns to hit back while dodging, and his acrobatic skills benefit him. He flips and turns and punches and kicks. He throws and runs and rolls and jumps. He builds muscle, loses baby fat, and trains to use his hearing to evaluate the position of his enemies and surroundings.

It takes many years, but he achieves physical perfection.

The final lesson is secrecy. (Wear a mask, don't let your enemy know any weaknesses, no matter how insignificant it might be. Keep your identity under wraps, to keep the people you care about safe.)

"What is your new name?" (This is it, he's abandoning who he once was...)

"Robin." (...Even if it's just a nickname, one thing remains of Dick Grayson)