I’m not sure how true this information is, but I’ve heard that there are a lot of independent manga circles who actually hire cosplayers to cosplay their original characters. If that’s true, then only a small number of people will know who this girl is and what series she’s from.
It must be nice to be a mangaka (manga artist) in Japan. Maybe I should learn the language and reset my goal to living there so that I can make a decent living from my art. In any case, thanks agin to Fumiki for sending this in!
EDIT: Thanks to Katserest for letting me know she's from Material Brave Ignition! And now I've found out that the name of the character she's cosplaying is Ogi Kanae!