So the way magical girl stories usually work is there's the Lead, the Team, the Fairy (aka Mascot) That Makes The Team and the Higher Authority That Sends The Fairy On Their Mission To Assemble The Team And Stop The Big Bad, Big Bad and Big Bad's Minions
In Magical Skeleton Multiverse Outer (aka Star) is the lead, which I decided before i found out about his devastating L streak so this AU is gonna be his one W which is good
Dream fits the role of both fairy and authority, being the one to help Star use his Justice powers and tracking the positivity associated with the seven souls and their skeleton wielders throughout the series
of course Nightmare is the Big Bad and his minions are of course murder time trio + Cross and Priest (aka SP!Dust, idk the lore behind him so I might end up making my own iteration)
Idk where Ink and Error would fit into all this