Sailor Headcanons

The fight between Sailor Cosmos and Sailor Chaos occurs during a so-called 'night of Brahma'. According to hindu cosmology, time is divided in kalpas, aka 'days of Brahma', and pralayas, aka the 'nights' where a partial destruction of the universe occurs. Indeed Chaos is extremely powerful during that fight, but that doesn't mean 'this is the end': that could signify the moment when destruction is necessary before another kalpa begins.

Ryland Grace making first contact with the Eridians isn't coincidence. He's from a timeline where Princess Serenity had a twin brother who was also reincarnated.

Minako and Usagi are the team's unofficial therapists. This played a role in Rei, Ami, and Makoto seeing her as unstoppable, Minako NEVER went to Usagi to look the perfect leader and they thought she was just invincible. Usagi, on the other hand, was seriously worried, and turned out to be right.

Usagi loves Scooby-Doo, it's her favourite show.

Sailor Saturn managed to kill Cthulhu when he awakened in 1998.

Minako knows the name, location, and borders of every single one of the old Japanese provinces, but has trouble with the prefectural system. Usagi is the complete opposite.

Michiru puts a lot of pressure on herself to be a "proper lady." Sometimes to the point where she worries the other outers.

Sailor Cosmos has a really lengthy life as a taoist immortal (Xian) or an existence as long as the hindu god Brahma's entire lifespan, aka 311 trillions of human years. After another 311 trillions of years, which is the exact time the universe is completely destroyed, another Sailor Cosmos is born and the cycle begins again.

The others were spent by the first set, before Minako decided they needed proper training.

Queen Serenity in an alternate universe is N'tse-Kaambl, who migrated to the moon. She created the Elder Sign and banished the Great Old Ones from Earth, the Sailor Guardians being created specifically to combat the Great Old Ones - namely Chaos.

The reason Tuxedo Mask doesn’t appear to have as many powers as the Sailor Senshi is not that he doesn’t have any, but because he’s been left to figure everything out by himself since his knights were turned evil, and Helios and the Maenads were trapped in a deep slumber for thousands of years.

Minako admitted it's not a coincidence, and she's waiting for Crystal Tokyo to lord something over "those metal-wait, Japanese doesn't have anything strong enough for them!"

Unfortunately, their magic backfires, and Zoisite is devoured by a dimensional shambler that he accidentally summoned whilst trying to cast a spell to kill the Sailor Senshi.

The most infamous method she used, inspired from the gag manga 'Tis Time for Torture, Princess, was having Makoto prepare her two bentos, eat hers in front of the suspect, and offer them the other if they confessed.

Haruka and Michiru dress up as Prince Eric and Ariel from the Little Mermaid for Halloween.

On Coronis (Lead Crow's planet), the gender presentation is similar to birds. The males will look feminine by our standards, but it's considered masculine in their culture, and vice versa. It would mean that Crow, who does look "feminine" on Earth, would actually be considered "manly" on Coronis. She'd basically be considered a butch by Coronis standard.