Koyori Akutagawa

Koyori Akutagawa is the female protagonist in the anime. She is the daughter of Dr. Akutagawa and Mrs. Akutagawa and the younger twin sister of Mayumi Akutagawa who is known as 'Sprocket Gear' and together with Tazuna Takatsuki where they are known as Team Gear. At first, she was unable to summon her own nimrods, but it is revealed that she successfully summoned her own nimrod given her code name by Hibiki Moriyama in Episode 9 and it was also revealed that Tazuna needed to hold her hand at all times to keep her life span stable but by doing this they can easily be identified as Hand Shakers. ...