kouga was raised by Saori Kido in an isolated island, and trained by Oppiouchus Shaina, a silver saint to be a Saint, knight of Athena. but little did he know, Saori Kido is Athena, the war goddess. one day, Mars the darkness God, kidnapped Athena, but Saori Kido has given him a necklace that inherited by the legendary saint Pegasus Seiya, the necklace can call the Pegasus cloth, and give him a supernatural power, cosmo. he met Lionet Soma who brings him to Palaestra, the school of Saint. 