Hey, it's me. Sorry for interrupting you again. But I just had a great idea.

I'm a big fan of the fanfiction Starfalls, I hope you read it. Especially the neighbouring kingdoms that are mentioned with their own royal families. I always wanted to combine that with the "Queens of Mewni" but couldn't until now and here's how.

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Estelaria "the First star's" daughter was Duska "the Merciless". Polaris "the Guiding" brought the mewmans from the kingdom of Old Mewni to the vast space that would become New Mewni.

Polaris' daughter is Constella "the Cultivator" who helped the new kingdom expand alot. On her travels to the frontiers she became enamoured by the insects in the area. She was the first to master the butterfly form and use it in battles. Constella's love for insects gave her 13 daughters, all with cheekmarks relating to her favorite insects: fireflies, dragonflies etc. She was the first queen to give birth to more than 1 daughter and thus created the matrilinal "eldest daughter becomes heir" rule.

Only the 2 oldest sisters of the bunch are important. The oldest, who was the heir: the starqueen Vega "the great divider" and the 2nd oldest: Lucita "the Terrible". Lucita wanted the crown for herself and on one of Vega's queen training missions at the frontiers Lucita murdered her mother Constella and convinced her younger sisters that Vega was the culprit. Things got out of hand though and the sisters started accusing each other of the murder.

The kingdom was on the verge of a civil war as Vega came home early from her mission. She managed to get the situation under control and together with the MHC and Glossaryck she created "the pact of the great division." The immense lands of New Mewni were divided into 12 sections. Vega would remain in control of the central section: Mewni. The 11 younger sisters, who only participated in the chaos, were made leader of each section. All ties with them were severed, the family name was taken away from them and their first name would become their family name, thus creating the 12 kingdoms seen in Starfalls.

Lucita, who caused the mayhem, was punished. She was banished from the kingdoms and had to take charge of the ruined kingdom of Old Mewni. Seething in rage, Lucita tried to curse all of the other kingdoms. It backfired and the last thing that was ever known of Lucita "the Terrible" was that she sank into the depths of the earth alongside her ruined, monster invested and ablaze kingdom. (With all the monster crossbreeding she would become the ancestor of the Lucitor family.)

Vega "the Great divider's" daughter was Hemera "the Builder", returning to the old line from Jgss.

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I hope you like that idea and that you might be able to use it for the other 2/3 queens you had planned, going by the names in the description.