Board Thread:Support Requests - Getting Started/@comment-24489208-20140130001506

I am trying to get my username changed, the username of my choice is "ゆ" (Without the quotes), I checked if it had been used, it had not, so I put in a request. Later I got a response saying I wasn't allowed special characters, which confused me since I have seen usernames which has included Chinese/Japanese characters, Arabic letters, and many others. I wonder if I could get some help with this, thanks. 