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