In the rich text editor:
@usagyuuun
In a comment:
[usagyuuun](https://chowlings.com/user/usagyuuun)
For Names and Avatars:
In the rich text editor:
%usagyuuun
In a comment:
[](https://chowlings.com/user/usagyuuun) [usagyuuun](https://chowlings.com/user/usagyuuun)
