Whatever else we may know about her, Mokoto lives alone in an apartment, and she's not one of the more talkative senshi, even if she is a LOT more outgoing than any of the outers. She has a lot of courage, which comes in handy. Physically, she is the most noticeable of the inner senshi in the fighting arena. She goes out of her way to protect Usagi, be it the manga near car accident or the anime punks demanding lunch money.