Hiremas Alkerith

Hiremas Alkerith is the physical embodiment of light and the Commander of the Alkerian army.Brave and loyal, he has always seeked the peaceful option, but will not shy away from a fight (In fact, he very much enjoys warfare). If you have a look at his picture, you will notice that one of his arms is BT.

His arm wasn't always BT. It was lost after his death at the hands of Aldebraan. After his death Alkerith was forced into the wraith world, where he met Spectre. After some time he, (Having to resort to the dark arts) rebuilt himself into a living being again, but it came at a price. His face was scarred (Although he did use dark magik to fix this, but now he tries to keep himself "pure" by leaving it as it it most of the time) and his left arm was beyond repair. He was cursed to remain forever as a half wraith. This means he can't die (He was biologically immortal before though, so it doesn't make that much difference), but he does suddenly erupt into bursts of violent rage, and is kind of undead. However, he gets loads of really powerful wraith abilities such as the vanishing which you saw in that story, and he also has a kind of x ray vision where he can detect life forms (But not unorganic objects like tanks etc), and his left arm can project energy beams.

That bit was copy pasted because I'm a lazy bastard.