In the rich text editor:
@Kina
In a comment:
[Kina](https://chowlings.com/user/Kina)
For Names and Avatars:
In the rich text editor:
%Kina
In a comment:
[![Kina's Avatar](https://chowlings.com/images/avatars/2371.png?v=1695299041)](https://chowlings.com/user/Kina) [Kina](https://chowlings.com/user/Kina)