I'm a user with a deliberately meaningless username.
Most of my edits are relatively minor to pages I stumble upon, as well as adding short descriptions and occasional category edits. Some of my edits here and on Commons also include XfD nomimations. I also edit the list of 'freaky' deleted titles and several related articles at times.
A lot of my editing experience on wikis comes from a small-ish wiki known as the Scratch Wiki, about the Scratch programming language (the wiki is mentioned briefly in the article), where I used the username Jammum, which I had edited since late 2018, and currently am a form of partial-admin.
I also use the Xeroctic username on the Minecraft Wiki (minecraft.wiki), which I infrequently edit.
I also have an account on another, undisclosed, wiki, which I will not immediately reveal (it is nothing to do with any genuine secrecy).
I have no other accounts on Wikipedia; I had made several IP edits between 2017 and 2020 and several away-from-computer edits after creating my account.