In the rich text editor:
@Dany_Tiger_Heart
In a comment:
[Dany_Tiger_Heart](https://www.worldofgaia.org/user/Dany_Tiger_Heart)
For Names and Avatars:
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%Dany_Tiger_Heart
In a comment:
[](https://www.worldofgaia.org/user/Dany_Tiger_Heart) [Dany_Tiger_Heart](https://www.worldofgaia.org/user/Dany_Tiger_Heart)