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