Shadow Galactica been played by two actresses, Haruko Yamaguchi and Megumi Wakamatsu. and appear only in Act 48 of the manga. Sailor Lethe is named for a naiad in Greek mythology, and for a river of the Greek underworld where dead souls go to forget their past lives before being reincarnated. Sailor Mnemosyne is named for the Titaness of memory, the mother of the muses, as well as another river in the underworld which brought remembrance and omniscience. Sailor Lethe has an attack called "Galactica Myosotis Alpestris", which she used to attack Usagi. Myosotis alpestris is the name of an alpine species
The Arm of the Starfish evokes the historical Macrina's scar, which her brother Gregory writes about in his "Life of Macrina". Classical names used in the book include Polyhymnia, the fictional Portuguese island of Gaea, named for a Greek goddess associated with the Earth, and Typhon, the deadliest monster in Greek mythology and the legendary "Father of Monsters." Finally, the names of Kali Cutter and Joshua Archer are significant. Kali is the name of the Hindu goddess of change, power and destruction, while the girl's surname indicates that she and her father have the power to cut (i.e., wound) others, both figuratively and literally. Joshua,