Yafrir
From Warhammer 40k - Lexicanum
Yafrir was a Master of the Angels of Absolution who led the Chapter's assault against The Faithless in the later stages of the Siege of Vraks.[1]
Operating under the orders from Supreme Grand Master Azrael to capture Arkos and bring him back to The Rock, Yafrir was aided by Interrogator-Chaplain Belphegor. At the height of the fighting against The Faithless, Yafrir met their leader, Arkos, in single combat. Arkos overwhelmed the Master with a Daemon Blade, ripping open half of his face. Arkos delivered the final blow by slashing him across the chest, then gunned down Yafrir's Battle-Brothers who attempted to come to his aid. Fortunately for the Unforgiven, Belphegor managed to defeat and capture Arkos shortly after.[1]