Having a username while the avatar has a name of their own..
From The Lost Media Wiki
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Is similar to Animal Jam where you have a username and your avatars also have a name of their own. This is an MMO I know of, which I also have concerns for it's future if it ever comes to an unfortunate demise. I do know a few users who rip from that game, and I myself will someday rip the assets to make sure nothing like that will ever happen.