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