An android with orange hair in a side ponytail. For some reason, they are mass-produced, and the raw materials are human. She dances with a smile, but her eyes aren't laughing and the highlights are gone. She has no emotions and does not speak. Many details about her remain unknown.

A 31-year-old human with red twin-drill hair who got caught up in the experiment. Her gender is Chimera—neither male nor female—but she has a feminine appearance. To escape, she entered a room filled with Rei's remains, so she borrowed clothes and changed her hair to a side drill to look as similar as possible. However, she is slightly shorter than Rei... but only slightly, so it's not a major issue. If she doesn't dance, she faces two choices: having her head replaced with a Rei unit or immediate disposal, so she is desperate. By the way, she uses "boku" for herself (soft/boyish) and "kimi" for you (casual).

They monitor the Reis to ensure there are no defective units.