Iliana was 19 when she first encountered the God of Death. Though at first he didn't scare her away and he was her only option to freedom, she later refused his help. The question is, what was Hades doing in the Mortal Realm and how come Iliana could see him?

Iliana is 19 when she encounters for the first time the God of Death. Though at first he doesn't scare her and he is her only option to freedom, she later refuses his help. The question is, what was Hades doing in the Mortal Realm and why could Iliana see him?