A question that I'd like answered is wtf is the twins' problem with voltans? Like, there must be some type of discrimination factor in here, because Mephisto and Praxina (especially Mephisto, if I remember correctly) were always doing little side jabs at voltans.
Off the top of my head, I can remember this one in particular:
"You're pretty smart for a Voltan." - Mephisto, season 1, episode 25
It seems to me like there being racism in Ephidea isn't too far fetched. In terms of world building it would be interesting to see how deep it runs, and the "reasoning" behind it.













