We will be able to become registered users of ポッターモア later, so we will need usernames and passwords because it wouldn't work any other way. または did I get your 質問 wrong?
Yes. あなた dont choose them though, there are a 一覧 of I think 4 (lol I don't even remember for all I know it was 2) usernames selected at ランダム in which あなた can choose from. Most of them sound really cool so don't worry you'll probably like it または grow to like it as あなた go along. I go によって the name MidnightElm, trust me you'll like the names I had trouble deciding which one I liked もっと見る lol. :)
