Hydra (ヒュドラ, Hyudora) is a Ghost ÄRM that merges the user with a serpentine monster. Hydra eliminates the memories of its user, and it cannot be used by anyone with human emotions. The mouth can fire a powerful beam of magical power.
It was briefly obtained by Chimera, but the ÄRM rejected her because her memories of her lover Marco maintained her humanity.
Etymology and Origin[]
From Latin Hydra, the mythical serpent, originally from Ancient Greek ὕδρα (húdra), from Proto-Indo-European *wódr̥ (“water”). The Hydra, also called the Lernean Hydra (because it lived near Lerna in Greece), was part of a brood of ancient mythical monsters. Its parents were the creatures Typhoeus and Echidna, and its siblings included other multi-headed beasts, such as Cerberus and the Chimera. The Hydra itself was a serpent with numerous heads (the exact number varied in ancient sources). Its blood and even its breath were poisonous.
The Hydra was eventually killed by Heracles, who was sent to fight it as one of his Twelve Labors. After a long struggle, Heracles found a way to prevent the Hydra’s heads from regenerating when he cut them off. Once the monster was finally dead, Heracles dipped his arrows in its poisonous blood; he would go on to use these poisoned arrows in many future battles.