Reiko is a member of the White Knights. Both girls are members of the school swim team with Kobayashi as its captain who holds a grudge against her fellow team member named Misumi. After they were probed by Alien Tendrils by Miyu and E.T.A.I. due to their strength. Manami is Reiko's lackey and follows her lead. Reiko has fairly spiky reddish-brown hair tied in a ponytail off to the side of her head. Reiko wears green sweatbands on her wrists and brown knee-high boots. She is beautiful yet arrogant. Near the end of Episode 2, Reiko and Manami fight Aika Sumeragi in the underground base beneath the chapel. In this occasion they show they have good coordination and fighting skills, but are still both eventually defeated.