The two keys are referred to as the Aether Key (Japanese: エーテルキー Ēterukī), fashioned from Savara's wing and hooves as well as being the most beautiful of the keys, giving off "a pure and calming feeling, as if all one's worries had been wiped away", and the Nether Key (Japanese: ネサー キー Nesaakī), fashioned from Naraka's fang and claw, as well as being the uglier of the pair, described as giving off "a feeling of ancient rage, as if something was about to destroy everything it considered evil or impure". The two keys are located on opposite 'paths' in the Desire World.