Hina Yumihara

She is Aoba's classmate, apparently she is from the year 2088 who came into Aoba's time in order to protect him from the Great Zogilia forces who came from her time to kill him. During her time travel to Aoba's time, she brought with her own Valiancer mech to fend off the Valiancer that came to kill him. An event she has prior knowledge about from Aoba in the future.