Sailor Pluto and her transformation is not shown on screen. She wields the Garnet Rod, a gigantic key which is topped by the Garnet Orb and a heart. The orb is one of three items necessary for Sailor Saturn's awakening and a reference to one of Japan's Imperial Regalia: the jewel. The reason for garnet specifically being associated with Sailor Pluto is probably due to an elaborate pun regarding her underworld-based powers and mythology. The Japanese name for garnet is "pomegranate stone" and pomegranates were the food of the underworld in the Greek myth of Persephone becoming Hades' (aka Pluto's) wife. Therefore
Pluto (mythology) The tree was the white poplar (Greek "leukē"), the leaves of which are white on one side and dark on the other, representing the duality of upper and underworld. A wreath of white poplar leaves was fashioned by Heracles to mark his ascent from the underworld, an "aition" for why it was worn by initiates and by champion athletes participating in funeral games. Like other plants associated with Pluto, white poplar was regarded as a contraceptive in antiquity. The relation of this tree to the white cypress of the mysteries is debated. The "Bibliotheca" of Pseudo-Apollodorus uses the name "Plouton"