Since Arquiussprite was included in Caliborn's masterpiece, which we can assume takes place on Earth/LOCAM, can we also assume that the rest of the sprites made it into Universe C? And that the sprites are long-lived enough to have stayed on Earth through the process of the sun becoming a red giant? Or am I missing a detail? Also thank you so much for this blog!

Well, we aren’t entirely sure, but  there’s three ways Arquius could have gotten there.

1: The sprites could have been allowed in the new Universe and he waited around a long time (remember the kids were surprised to see him so they din’t bring him)

2: Assuming that Lord Jack’s blackhole lead to Caliborn’s session he could have gone through there.

3: Based on what you think happened to the Furthest Ring after Calliope blackholed the Green Sun, he could have flown there.