pain tol·er·ance
The amount of pain that a person can withstand before breaking down emotionally and/or physically
Despite his fragile appearance, Ciel has an extremely high pain tolerance both emotionally and physically. He does not enjoy pain - but he’s not afraid of it either. His mental state as a human being has been altered because of his past. This means that he is desensitized to death and other disasters, which would lessen his reaction to such painful things. Physical pain is just a feeling in his eyes. But that does not mean he doesn’t get hurt, it means he can withstand it for longer periods of time than the average person. He has grown accustom to it and feels that it’s one of his many strengths.
