The titular heroine, Sakura Shinguji is a swordsman who was part of the original lineup of the Flower Division which is tasked with acting in plays as well as defending Tokyo in her mech suits. 

Approximately 17 at the beginning of the series, Sakura is your "vanilla" girl, being both subtle enough to be the "canon" romance in the games, while also having the depth to showcase both strength and femininity. 

Generally she's a very cheerful and spirited girl while also having the classic jealous streak when it comes to the player character, Ogami, talking to other women.