Not a coincidence.
But it was done first in Piratez, which uses a similar sprite for a late game armour type for your girls. It's called Destructor, but the internal name is STR_ARRANCAR.
*Checks outfit, notices the hole*
Now I realize why it seemed familiar. *headdesk* How nerdy you guys are. Then again, there are genuine Magical Girls (if the Madoka grimderp variety sadly) and more.
X-Files is way more serious, but I'm convinced said magical girls or something equally silly will be eventually implemented as an easter-egg, if it hasn't been done so already.
By the way: I can use Dart Weaponry in Beach missions. Is that intended? I mean, they vaguely look like toy guys, but perhaps that's an oversight. They're also available for League apprehension, even though the Rifle is not a concealable weapon.