diff.text: '''Sailor Lethe and Sailor Mnemosyne''' were two [[Sailor SenshiSoldiers]] [[Animates]] who appeared only in the manga. They guarded the river outside of [[Sailor Galaxia]]'s palace, [[Shadow Galactica]]. They appeared at the very end of the manga for only one act, Act 48. 
diff.text: The pair introduce themselves to the group and tell their story. They discuss war and wonder if it can ever end. Sailor Moon tells them that she'd give up her life if it meant the end of the war. Lethe tells her not to die, and they help the Senshigroup find Galaxia.