In high school, I was in the anime club. For the most part, no one spoke in broken Japanese, or cosplayed outside of cons and specific cosplay events. Honestly, most of us didn’t even cosplay.
We kind of devolved as a club (we didn’t do anything but watch artsy anime and Miyazaki movies). One day, though, a girl came and began hanging out with us. I knew her from other things, but had no idea she was into anime. We talked about anime we both liked, and then started talking about things outside of anime. I discovered we had a lot in common. We started hanging out, and she would frequently stay over at my house. It grew to the point that we were practically living together.
Then she began talking about her fanfiction. Now, don’t get me wrong, I read fanfiction and even write small stories sometimes. But she hadn’t actually written it, she would just talk endlessly about her “story”, and her self insert original character. I’ll call her “Rose” (about as generic as her character’s actual name).