A young girl who comes from a poor family, she leaves home to find work in a nearby city, where she often gets fired or scolded due to her clumsiness, because of it she always has apprehensions of being fired whenever she does something wrong. She later ends up joining the Lime Unit instead. Momen calls Shintaro brother because of his similarities shared with her brother. She is very active and incredibly strong, but she is pretty much immature and a klutz, that she should would often trip and expose her panty to Shintaro. She is ready to do anything for Shintaro, where she even wakes him up every morning . Momen controls the red Lime, "Yukimura" (wields a sword).