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