Ahh, cosplay. :D I can only speak for my own experiences, but I'd only attended multi-fandom events. I can't imagine a scenario where only one series is represented. And when there are many thousands of people around, showcasing dozens of anime and hundreds of characters, there's a big thrill in just being able to point and say "I know who that is!"

When a series is still new or still rare, seeing people cosplaying from that and recognizing them gives a certain sense of connection. When you cosplay a series, you become a walking billboard for that series. You're saying, "Hey, I've seen this series, I enjoyed this series, and I love it enough to put this much work into the costume." The more work you put in, whether it's the little details or the big impressive monster costumes, the more it says, "I thought this character was worth putting this much time and effort into cosplaying."

Pardon me for barging in, girl_starfish sent me. V. amused by your rename for the con.