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