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