A more thorough explanation:

A public character is a person who has achieved fame or notoriety or who has voluntarily become involved in a public controversy. This term is also known as a public figure.

For example, a celebrity who is constantly in the media spotlight is considered a public character. Another example is a politician who holds a public office and is known by the public.

There are two types of public figures: all-purpose public figures and limited-purpose public figures. An all-purpose public figure is a person who has achieved such widespread fame or notoriety that they are considered a public figure in all contexts. A limited-purpose public figure is a person who has become famous or notorious only in relation to a particular public issue.

For instance, a celebrity who is known for their acting skills and also actively participates in political activism can be considered an all-purpose public figure. On the other hand, a person who becomes famous for their involvement in a particular public issue, such as a victim of a crime or a witness to a significant event, can be considered a limited-purpose public figure.