Hm, I've never heard either of these phrases.
What kind of god is he/she/it? Calm and just? Severe and unmoving? I think both those names work fine. Like you said, Io has a calm, mysterious...
Alright, sounds like a good read to me. Thousands of stories start with a "vision" or "spirit." Good stories.
That's what happened to Joan of Arc, and she's awesome. Except it was.. you know.. God that told her. I think it would be more powerful if this...
I think five years is plenty of time to convey that change. The reasons just need to be convincing.
Separate names with a comma.