Mantid

Mantid is a mantis-type Invectid who rules the loose-knit nation of Invectids. From the top floor of his fortress, he directs his Invectid troops to remove the wasteful and hated humans from the Inner World and find the Oracle Keys. Although it is assumed by his followers that he is the ultimate in Invectid evolution, Mantid actually wears a covering of high fidelity mechanics, which encases the body of a human! Anyone who finds out must be slain. He needs the Oracle Keys to sustain himself for some reason or else his body turns white. With two Oracle Keys, Mantid's actions had caused the Oracle sun to go dark and prevented Hunter from using the Oracle keys. However, after regaining that ability, Mantid decided to meet Hunter face-to-face. After Hunter is captured in the Labyrinth, he is brought to Mantid's Castle and finally comes face-to-face with Mantid himself. Mantid planned to trick Hunter into getting the Oracle Keys for him. Quake appeared and told him of Maintid's true intentions. Mantid reveals that he was a human and a chosen warrior of the Oracle, pulled against his will into the Inner World. His reason of taking the Oracle's power is revenge upon the Inner World and the Oracle herself after many losses, including his beloved. After absorbing the Oracle Keys' power, Mantid becomes extremely powerful when he becomes Oracle Mantid. Some changes in appearance are noticeable, such as his cape, which has become a mix of neon colors. The armor on his cape also becomes bigger, purple, and gains a gold border on the outer ring. The mask like thing on Mantid's face also grows out more. He also gains incredible strength and psychic abilities. After being spared with kindness by Hunter, Mantid reverts into a human and reunites with his lover Loraine.

(Source: Wikipedia)