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