Sailor Pluto. She's the only Sailor Guardian that dwells in the space where the Door of Time and Space resides. Her sole mission is to protect the door and to not let anyone not even Sailor Moon ...

After some time, Usagi and her companions (including newcomer Sailor Pluto) have ventured to the future, though Sailor Moon ...

With how often the Sailor Scouts mess with the flow of time, there are certainly multiple timelines and paradoxes created.

Pretty Guardian Sailor Moon - Petite Étrangère is the 31st Sailor Moon musical. It focused on the Black Moon arc and it featured Sailor Pluto , Chibiusa , and Black Lady.