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