@saranghaeya_ ok so, you hit your account name that's in the top right corner, when the options pop down, hit settings, then it will take you to a page with your info, underneath username, password and email, it should say name, click the box and type whatever name you want on you profile, hit the show button so is shows a check in the little box, at the very bottom of the page, there will be a button that says save, click it! I hope that helps, it should work!