Aither

Iri and Seraph
He is the first of four.
They say he started kind, if not somewhat haughty. He cared deeply for his family, especially his father. He found his library one day, a sentient sort of one that thrives off the information of the dead. He served as it's gatekeeper, as it was far too distrusting to give anyone else a chance. Despite this, all was well.
However, then the creator of the library appeared. Ishmael, with his schemes and plans did damage that did not vanish even after Ishmael stopped focusing on Aither. He became more like Ishmael, cruel and scheming with only a few ever safe, until he eventually fell completely.
They say, though, that a shadow of him still exists, desperately trying to right the wrongs of both himself and Ishmael.
Only time will tell if he ever reaches his goal.