The reason why I state that Hikari Kiwamuru was 12 years old is that it takes many years for any deity's human age to grow up. I estimate that it takes at least hundreds of thousands of years (estimate: 1,000,000 to reach his/her birthday; that's more than 100s of 1000s of years). Kiwamuru is still 12 years old as of the time of this writing. Sanat was destroyed by Esther on April 10, 2016. Anyone can be resurrected and/or reincarnated after 3 days however.
This was an important event in the Reformation of Heavenly World which made the ongoing fall of the Hierarchy easier to process. Of course, it was that way, and it changed everything. The importance was felt on the entire universe, and that allowed the Reformation of Earth to begin.
It is stupid to believe that "Niburu will destroy Earth", because Niburu was destroyed in 2012 and will never exist again, thus Earth won't be destroyed in 2017. Earth will not end in 2030 either. Thus, Earth goddess Saotome survives.
And one more thing by the way: The Central Sun known as "Wo" (apparently Hikari Kiwamuru) is doing the Final Judgment now. It started earlier this year and is still current, yet it will end soon. This is not the only time it existed. Every one trillion years (the universe is 5,000,000,000 years old now), a Final Judgment happens.
march27,2017update: "she transformed him" became "she made him transform".