Rock

One of the Four Guardians. He distrusts Kujaku and is aware of Kujaku's ambition to take control of Zenom. He is the Angel No. 5 - Samuel, and as a result has the ability to remove collected demons from the dark Kabbalah. His eye seems to have the power to detect recipes and nuclei of both Kabbalah. In battle he appears to dual wield two pistol looking weapons which may or may not be O-Parts. On his back, he carries the O-Part 'Twelve Watchers', which emits twelve laser beams that Rock can control. He showed his true form at the end of chapter 71, and has the nuclei of Samuel removed at the end of chapter 72. (Source: Wikipedia)