Ramon II/secret
Ramon II was rumored to have replaced his left arm with an enhanced strength cybernetic replacement which he covered when necessary with a pseudo-biological cover. The features listed were integral to the advanced cyber limb and not part of a gauntlet.
He is also rumored to have used his time on the throne to get tested for psionics. Because of his age at the time, his powers were limited. He secretly used psi boosting drugs to help compensate for the lack of psionic strength. He had a special power which manifested as a weak precognition which gave him flashes of insight when it concerned his personal survival only. Interestingly, he had a feeling minutes before he was going to die on the bridge of that battle cruiser, which may have had something to do with the enormous array of spinal mounted meson guns targeting his shattered flag ship.