|Full Name: Kasumi Momochi|
|Ranger Designation: Momo Ninger|
|Gear: Ninja Ichibantou, Gamagama-ju, Karakuri Hengen|
|Otomonin: Byumaru, Pandamaru|
|Kasumi is a very reserved girl who loves science and is very astute with mechanics, but she is unable to read between lines or take a hint. She can be really sharp-tongued and soemtimes shows her feminine side. Kasumi sometimes shown to be a little mischievous, placing notes on her teammates. One of Yoshitaka Igasaki's successors, Kasumi was one of his grandchildren chosen to become the Nin Ningers. She was called by Tsumuji Igasaki, her uncle and Takaharu and Fuuka's father to return to their dojo despite being turned into ruins. Like the others, Kasumi had no choice but to take the mantle of Momo Ninger, the smart ninja and learn Ninjutsu to stop Gengetsu and his followers.
After the final battle against Gengetsu Kibaoni, Kasumi decides to continue research the secrets behind the Nin Ningers' arsenal through her scientific studies.