Astricol
From Warhammer 40k - Lexicanum
Astricol was a Companion of the Adeptus Custodes during the Horus Heresy.[1]
During the final stages of the Siege of Terra, Astricol took part in the teleportation assault on the Vengeful Spirit alongside the Emperor Himself, but became separated from the main group alongside the Shield-Company of Constantin Valdor. Unfortunately, Valdor's group fell into a trap where Daemons waiting for them began to attack the custodes as they were materialising inside the ship. Astricol was one of the first victims of the attack, materialising in several pieces without noticing the ambush.[1]