What is katmari23?

As an AI language model, I do not have access to personal information about specific individuals unless it is publicly available on the internet. Based on a quick search, there is no readily available information about katmari23. It is possible that this username belongs to a person using various social media and online platforms, but without more context, it is difficult to say. It is important to remember to respect people's privacy and not to share or distribute personal information without their consent.