Vanguard Princess is a 2 vs.2 fighting game developed by Tomoaki Sugeno that features a thrilling, yet slightly shocking storyline. The Government was conducting experiments on a young girl, when something terrible happened, a cosmic wave shot out of the girl, leaving her badly damaged. The same wave hit a number of other girls, however, it did not hurt them, it gave them great powers! Now, the girl that was experimented on came back with powers of her own, and she is out to destroy the world in her furious search for revenge! The girls now have to learn to use their newly-gained powers and take on the furious antagonist, as they do whatever they can to save the world!

Vanguard Princess (ヴァンガードプリンセス, Vangaado Purinsesu?), also known as Vanguard Princess: Senjin no Himegimi (ヴァンガードプリンセス 先陣の   more on Wikipedia