Medurone (メデュローネ) is a member of HRMC and a member of Team Helion participating in the Gryps.
Medurone has clean kept hair and wear glasses. She is mentioned to have good proportions. She is also older than Roverika.
Medurone appears to be calm. She seems to be the brains of the group as she immediately recognized Ayato, Saya, and Rusalka.
Genestellar (星脈世代): As a Genestellar, Medurone has enhanced physical ability and an aura known as prana.