Kalhin
From Warhammer 40k - Lexicanum
Kalhin was a member of the Adeptus Custodes during the Great Crusade and Horus Heresy.[1a]
Kalhin was one of the Custodes under Aquillon tasked by the Emperor to monitor the Word Bearers, serving alongside the Legion for years.[1b] However when the Custodes were killed during the Drop Site Massacre, Kalhin met his end at the hands of the pro-Word Bearers Tech-Priest Xi-Nu 73 and his Conqueror Class Robot.[1c]