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