Years ago I had really severe anxiety and intrusive thoughts. I noticed though as my anxiety got better through among other things therapy that the intrusive thoughts took on a new form; Unbidden and often times inappropriate shitposting IRL.

Personally, most of the time I don't really hear my internal monologue. It's there but it kinda tends to get drowned out by a constant swirl of other random thoughts unless I externalize it and talk to myself, but I do hear the intrusive thoughts loud and clear. Add those things together and I like to joke that I accidentally manifested a shitpost tulpa.

Then because I found this thought amusing I came up with an entire character to put to it.