ヤノ・マミ

A member of the Bougainvilleae squad, known as Ondine. A brown haired girl who views the relationship between Takuto and Wako as dirty. She, like Wako, Takuto, and Sugata, possesses a true mark, Kaph. Her First Phase allows her to summon a human-sized fighting doll called Mermaidoll, which is hard to destroy and can multiply, making her one of the first few opponents to actually cause trouble for Takuto outside of Zero Time. Her Cybody's name is Kaphrat. Despite possessing a mark, for reasons unknown she did not join the Vanishing Age during the third phase.

From url=https://en.wikipedia.org/wiki/List_of_Star_Driver_characters##Glittering_Crux_Brigade.