[Spoilers] Are these plot points explained in a specfic route or somewhere in Parts 2/3?

I've been loving the game thus far and enjoying the game at my own pace. I've done about 2.75 routes (Cai, Dietrich, and currently on Theodora's) for part one and am excited to find out what happens in Parts 2 and 3. However, I did do a small peek into Part 2 before I went back to the other characters. There are a several questions that still linger regarding certain characters and their relationships and the plot.

Dagda the Great

1. Was there a reason why Dagda the Great went to sleep for 500 years?

2. Why did he destroy Damascar after allowing Yu Phas to save 5000 of their ancestors? >!Was it just the fact that they lost Balor's body parts? Or was that a convenient excuse for his bigotry/addiction?!<

Solel

1. [Part 2 Spoiler] >!Is there a specific reason he got executed by Dagda after he wakes up? He seems like a pretty chill guy and a normal head-of-state albeit a little unaware about some things internally. Was his ruling style/political agenda just too passive/opposed to Dagda's?!<

2. I saw some disturbing speculation/theories about the parentage of Aurora. Is there additional evidence to back it up or is it coincidence? I won't elaborate the specifics but will mention it in a spoiler comment upon request.

3. !How did his heart get recovered by Fortuna?!<

Yu Phas/Her sisters

1. Was it mentioned why Yu Phas got killed? Was it the fact that she abandoned her station to be with Solel?

2. !How did she become Orchel? I know Credna is involved, his name is still obscured in the blessings menu despite me maxing it out.!<

3. !Yu Phas/Orchel seems very different from her sisters from a personality standpoint. Can this be chalked up to amnesia/new body or was this what she was like as Yu Phas?!<

4. Did the 4 sisters originally plan to revive Balor from the very beginning? Or was this something that came into fruition after Yu Phas left the island?

That's all I have for now. If something is explained in Parts 2/3, just mention that but not the specifics. If it's a Part 1 reveal, I would very much like to know.