User blog comment:HankGuideDude/Hia-logue 5-01: The Prism & Upsilon expansion/@comment-1827303-20190404202150

Great writeup, I forgot some of the points here over the years, myself.

Aro derives from aromanticism, as a counterpart to the other planets being named after the types of love proposed in John Alan Lee's colour wheel (with the exception of Narcissus, which is meant to be a different kind of counterpart).

For clarity's sake, Berengaria is truthfully part of the original Beast, but due to ties to her sisters Caledonia and Leviathan, any one member of the trio can theoretically be used as substitute.

The issue of where the blame lies for what happened to the Proto-Planet is fuzzy, with the archangel Humilitas being a likely true culprit, driven by a fear of obsolescence in a society that grew ever more harmonious. Of course, the nature of the incident varies by timeline, with the Calamity not even coming to fruition in Stigma, so YMMV.