Everto de Ivalice Redux
Altiar is the Angel who has appeared to Nathan and gives him guidance. He has warned Nathan of a great cataclism that is coming and has told him that he must prepare. According to him Nathan is the ‘chosen’ and ‘special’. He tells Nathan that he will be the one to lead in a new era in which the church reigns supreme.
Altair was really an outsider his goal is to incite Nathan to further levels of violence.