Although it is not explictedly stated that Lyra Orphée and the Orpheus of Greek mythologies are one and the same, it can generally be assumed that the silver saint is, at least, the reincarnation of the tragic Greek character.
Although it is not explictedly stated that Lyra Orphée and the Orpheus of Greek mythologies are one and the same though their respective stories occured in different timelines. It can generally be assumed that the silver saint is, at least, the reincarnation of the tragic Greek character.