Well, what can you expect? It is Comiket Season, so there will be a ton of awesome cosplays that I don’t know about!
Now, I’m not much of a sports fan to begin with, and that doesn’t change much when it’s an anime or manga series. But I can’t seem to shake off the feeling that this isn’t even from an anime. I think she’s a baseball mascot from a real team, and Japan is well-known for its love of baseball.
I’m going to need your help as usual with this one guys! Thanks again to 4chanatic for sending this in!
EDIT: Thanks to anon for pointing out this is BuffaloBell from the Oric Buffaloes! For once, my guess ringed true, she really is a baseball mascot! I guess the Japanese really love baseball!