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