“Deadeye” is a high profile agent and Toa of Fire working undercover for the Order of Mata Nui, whose real name is not known. His codename was given to him by his comrades in the Order who noticed his extreme accuracy (on par with a Sanok user) when using his signature rifle. During the BoM-OoMN war, he was killing lots of Makuta with no regard for the Toa Code. He was then noticed by Teridax taking out huge swaths of his army, so Teridax sent Makuta to kill him. Deadeye fought back and gravely injured the Makuta, but they had gotten the better of him. He was hit squarely with a powerful blast of pure shadow. It had severely damaged him, and destroyed part of his brain. When the Order found him, he was in an extreme vegetative state but he was still alive. His original Kanohi, a red-black melded great Miru in noble form, was destroyed by the blast. The Order replaced his red armor with black armor to disguise him from the Makuta to prevent possible Makuta retribution, and gave him a bionic eye, the one in blue. Luckily, his mind and personality weren’t affected much. He was given a great Kanohi Kiril in noble form, with two extra lights similar to Maxilos’ mask. After being recruited by the Order, “Deadeye” quickly discovered his skill with the gun and developed the best accuracy out of everyone in the Order, which led to him being put on high profile missions, such as the capture of Tohru, in which he had lost his right arm. He is also skilled in melee combat, but the gun is where he shines. His accuracy is said to have rendered even the Sanok obsolete; that is just how skilled he is with a ranged weapon.
C&C is appreciated!