Charles-Henri Sanson is one of the main characters and protagonist of Innocent series. Born in 1739 to Charles Jean-Baptiste Sanson and his first wife Madeleine Tronson, he was the fourth in a six-generation family dynasty of executioners. Charles is described as a beautiful young man with straight long dark hair. Older Charles has longer and wavy hair that is usually always shown to be slicked back. He resembles his father more with large shoulders and rib cage, but still has soft facial features and hands. His complexion, hair reflexions and eye color is odd and changing from volume to volume but are generally a ghostly greyish, bluish, purplish shade except for two examples where it is white with green or brownish shadows.

Spoiler

Charles was shown as man of pure and kind nature, who respects life, which was considered an unusual trait for a person who was born into a family of executioners. Subsequently, he had to endure being subjected to prejudice from society, as they saw his family as ruthless and emotionless monsters who were born to bring death and misfortune to others. When he was younger, he was shown to experience vomiting when in presence of dead, not being able to stomach the smell as someone from his family should. During the executions back in his younger days, due his soft nature, he was known to have mental breakdown and panic a lot, not being able to stand prejudice of people which would cause his executions to end up in more messy way then originally intended. Later as he became new head of family and eventually left the house of his grandmother and father, he started to change radically as he became more accustomed to pleasure and lifestyle of a playboy.

In the second part "Rouge"

Spoiler

Although his personality has become more closer to his father (but in more sadistic), he still possess that one side that is not necessarily completely ruthless, such as considering the pardon of sinners. As the second season progresses, he does seem to come back to his more compassionate ways, although not completely.

(Source: Innocent Wiki)