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