Psychopathy

Psychopathy, or psychopathic personality, is a personality construct characterized by impaired empathy and remorse, persistent antisocial behavior, along with bold, disinhibited, and egocentric traits. These traits are often masked by superficial charm and immunity to stress, which create an outward appearance of normality.

personality disorder that involves a pervasive pattern of disregard for other people

Remorse is a distressing emotion experienced by an individual who regrets actions which they have done in the past which they deem to be shameful, hurtful, or wrong. Remorse is closely allied to guilt and self-directed resentment. When a person regrets an earlier action or failure to act, it may be because of remorse or in response to various other consequences, including being punished for the act or omission. People may express remorse through apologies, trying to repair the damage they have caused, or self-imposed punishments.