Introduction
As usual, I don't own Harry Potter or Sailor Moon. Must work on fixing that. *ahem* Anywho.
There's some background you definitely need to know before reading these. First off: This is set in the Harry Potter universe but with Sailor Moon characters as inhabitants of said universe. This story will mainly revolve around the Outers but also has cameos of the Inners and various JKR characters, most notably Marauders and co.
Secondly, some of the original canon has been tweaked. Haruka teaches flying and referees Quidditch, not Madam Hooch, Michiru co-teaches Divination instead of Firenze and Setsuna teaches History of Magic instead of Binns.
Quick rundown of each character in this AU:
Setsuna: Sets went to school with James and Sirius and their lot. She was fairly close to them during her school years and actually dated Remus for a while. Sorted into Ravenclaw, Setsuna was a part of the original Order and adopts Hotaru after Hotaru's father is killed by them.
Michiru: Michiru is a Slytherin. (Because let's face it, she's the type.) She met Haruka the first day of first year and they absolutely hated each other until around fourth or fifth year. (Hmm, has echoes of another couple, no?) Michiru teaches Divination to half of the fifth, sixth and seventh-year students. She's the only one who doesn't want to kill Snape on sight or have the urge to throw him off the Astronomy Tower sans wand.
Haruka: Haruka is a Muggleborn, the only one of the Outers (everyone else is pureblood). She and Michiru are both around the same age as Tonks, maybe a year or two older. Haruka was sorted into Gryffindor and was a star Chaser on the House team for five years. (I actually debated having her be an Auror, but I wanted her in the story a lot, so she's a teacher.) She absolutely hates Snape and harasses McGonagall whenever possible.
Hotaru: Hotaru is also in Ravenclaw and the same age as Ginny and Luna. Her dad was a Death Eater who was responsible for the murder of several notable Order members. He died shortly following the Lestranges and Barty Crouch Jr. being sentenced to Azkaban. The Order members felt responsible for killing Hotaru's only family, even if he was evil (her mom died right after she was born), and so they kind of took it upon themselves to find a suitable home for her until Setsuna stepped in.