Rodent girl??

OK, I don't know why this girl is dressed as a gerbil, or hamster, or whatever...but she has rolled up her sleeves to display some nice biceps. I also don't know why they were measured in mm rather than cm...but at least they were measured. (253 mm on the right arm)(that's just shy of ten inches for those that are metrically challenged). She must be a small girl because those ten inch guns look fairly big.