What are those circles around avatars called and how do you get them?

They're so pretty, how do users get those?

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Emblem. Allkill or guild.

Thank you and oh no

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There are red carpet ones available to everyone

Really? What's a red carpet? Thanks for replying!

Quote from omnimorphism

The event where idols come here and answer our questions. Just go on edit profile.

Thank you, you were of great help!