Jukai

A middle-aged guy named Jukai travels the world treating ill people as a traveling physician. He is particularly adept at creating prosthetic limbs from a deceased person's body. Jukai formerly worked for a terrible ruler who ordered him to carry out a number of horrific acts, but he abandoned all of them in search of a path to redemption. He gave a little boy prosthetic limbs after seeing that he was missing several bodily components. He was taken in by Jukai, who named him Hyakkimaru. He treated him with kindness and even taught him how to survive in a world full of monsters, despite his terrible history.

Following that incident, he was seen to have a kind and altruistic nature, taking care of people without expecting anything in return. He is, nevertheless, extremely committed and a workaholic, going so far as to sacrifice his own sleep in order to provide prosthesis to the unfortunate or disfigured dead on the battlefield. Kaname, his former foster son, once more began to believe that his death would be the consequence for all of his transgressions after realizing that he was the one who had tortured and crucified his parents.

Jukai appears to have bonded closely with Hyakkimaru when he was a newborn, much like he did with his previous foster son. But because he created a whole body for him, reared him, and gave him battle training, their link was more pure.

Anime: Dororo