Mako (Voiced by: Kaori Mizuhashi): Nurse Sanada's older sister, even though Mako is physically younger due to Sanada having fallen into a time warp. She communicates with Riro through a pair of bobbly antennas on her head, which Riro later uses to mentally control her.
Mako (Voiced by: Kaori Mizuhashi), Nurse Sanada's older sister, is physically younger than she appears because of Sanada's time warp. She communicates with Riro through antenna on her head, which Riro uses to control her mentally.