disciplinarian

a person who believes in using rules and punishments for controlling people ผู้ยึดถือระเบียบวินัยอย่างเคร่งครัด

Being a disciplinarian might not always make him popular with the players, but when it comes to their emotional needs, they know they can depend on him.

Especially in the early days, Sassoon was a disciplinarian as a salon-keeper, known to send employees home if their shoes were not shone.

Prosecutors said the defendants allegedly killed the three teenage sisters because they dishonoured the family by defying its disciplinarian rules on dress, dating and using the internet.