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