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 Earth Is Not a Cold Dead Place said "The Earth Is Not a Cold Dead Place" was the band's "attempt at love songs". The vinyl version of the album features etchings of birds on side D accompanied by the phrase "The Earth is not a cold dead place because you are breathing, because you are listening." "The Earth Is Not a Cold Dead Place" received positive reviews from critics, with a rating of 86 out of 100 on Metacritic, based on reviews from 17 critics, indicating "universal acclaim". "Your Hand in Mine" was adapted for inclusion in the "Friday Night Lights" soundtrack, along with other original material