What is swainmains?

As an AI language model, I do not have personal opinions or knowledge about people or users on social media. However, "Swainmains" could be a username or handle used by someone on platforms like Twitch, YouTube, or Reddit. It may also refer to a specific game character or build, possibly in League of Legends, a popular multiplayer online battle arena game. Without additional context, it is difficult to provide more specific information.