So you have already had it changed once, now you want to change it again? That makes even less sense. Especially if you consider the only reason you changed it was due to the fact that you where watching a particular anime series. Instant gratification never pays off. Think what it would be like for the admins if members wanted a name change every time they started watching a new anime they really liked. Also you have built up a reputation whether good or bad with your current name. If you change it no one will no who you are.
As I stated the only way to get a new name is to start a new account so have at it.