In the rich text editor:
@Faelicity
In a comment:
[Faelicity](https://chowlings.com/user/Faelicity)
For Names and Avatars:
In the rich text editor:
%Faelicity
In a comment:
[![Faelicity's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Faelicity) [Faelicity](https://chowlings.com/user/Faelicity)