Sailor Lethe ( )
MANGA: Lethe was the guardian of the River of Oblivion. Their planets were small, and poor. It was always chaotic, with never-ending fights. Galaxia appeared, and death and silence came to their planets. They felt there was no choice but to follow her. She took Eternal Sailor Moon and the others across the River in her ferrry boat. The soldiers fall to the bottom of Oblivion, forgetting their mission and loved ones. Lethe was betrayed by her partner, Mnemosyne. She explained to Lethe that it was better to have Galaxia decide their fate. Both of them were killed by Sailor X & Sailor.
MANGA: She seemed to be more harsh than her partner, Mnemosyne. She attacked while her partner tried to hold her back, believing it was not their place decide Sailor Moon's fate and to allow Galaxia to do so.
"Forgetfulness". In Greek mythology, the Lethe is one of the rivers that flow through the realm of Hades. Called the River of Oblivion, the shades of the dead had to drink from this river to forget about their past lives on earth. - Encyclopedia Mythics Area
Born to Die | Desert River Senshi | Undertow