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