How come my profile says "ESFN00b"?

[Vegeta's Briefs]

I clicked on my profile and it says "ESFNoob", but I've been playing for as long as a week. What's with that? Is it specifically forum, or does it trace out internet name or what? P.S., my game names are Vegeta Bell, Vegeta, and Vegeta's Briefs

 

[Tien]

rofl...lol...lmao...you can change your Custom User Text in User cp > edit profile >

 

[Vegeta's Briefs]

thank you