Megami Kouhosei

Megami Kouhosei takes place in the future, where humanity has established colonies on other planets. However, an alien species known as Victim attacks these colonies, leaving Zion as the only remaining human settlement. In response, the Government of Zion sets up a training school called GOA to recruit and train boys from Zion with the rare EO blood type and special abilities, known as EX, to pilot the Ingrids, five powerful fighting robots that protect Zion. Zero, candidate 88, forms an unexpected bond with the Ingrid Eeva-Leena when he successfully synchronizes with the robot during his initial training.