Disciplinarians are characters (usually parents, relatives, siblings, monarchs, or teachers) who discipline other people, usually to teach them right from wrong. Some are very strict or fierce (sometimes too much so, as in King Triton's case), but they are generally kind to those they care about. Examples include Mufasa, Professor McGonagall, Fu Hua, Scrooge McDuck, and Queen Elinor.

These heroes' use of firm discipline is usually meant to keep others safe, maintain order, or usually remind them of the consequences of their actions or the rules of a community.

While some can be strict, some Pure Good heroes can be disciplinarians as well as they may genuinely care about the people they discipline without causing despair and negativity towards said people.