What is the purpose of a soubriquet?

The term "soubriquet" refers specifically to a nickname or an affectionate name given to someone. This usage suggests a level of familiarity or fondness, indicating that the person using the term likely has an amiable relationship with the individual being referred to. Soubriquets often relate to personal characteristics, habits, or particular traits of the person, highlighting their special qualities in a light-hearted or endearing way.

In contrast, other options represent different concepts. For example, formally addressing someone typically involves using titles or surnames rather than a nickname, while expressing disdain implies a negative sentiment rather than affection. Formally introducing someone usually requires the use of their full name and title, rather than a nickname associated with familiarity. Thus, the purpose of a soubriquet aligns neatly with the idea of an affectionate reference, which makes that choice the most appropriate.