In the rich text editor:
@NobleSir
In a comment:
[NobleSir](https://www.worldofgaia.org/user/NobleSir)
For Names and Avatars:
In the rich text editor:
%NobleSir
In a comment:
[](https://www.worldofgaia.org/user/NobleSir) [NobleSir](https://www.worldofgaia.org/user/NobleSir)