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