Mako

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. Yuuki saves her from this mind control with the help of Sanada, Pao, Ai, and Zero. She is the leader of the aliens and also pilots the alien's pink UFO.