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