sooooo the dying will flames are only accessible to human and kawahira's outer-space-kind like seraphina giglio. sooo there's a planet outer in the universe that have flames similar to humans is that it?

That theory of Lotor and his guardians sounds really good. But what if Lotor is also rejected because of his mist flames. Zarkon in your verse is a cloudy sky, so as a sky he attracts elements. What if Lotor's mist Flames were always trying to court his father's sky Flames. Then when he was labeled as a traitor to the empire, that made him in the state he is in as well.
That is just a thought though.

Take care.