The Nameless God

Along time ago, there live 7th devil's. Life in hell was not good heaven and hell were in a war and the 7th devil was sent to the front lines. When in war the 7th was about to die but the king of gods accepted and the 7th becomes a angel. But after the war the angel or devil decided to leave heaven and hell and go to earth. But before he left the king of gods cut some of he's memory. Will the 7th get his memorys back?