Kalimos
Kalimos was the Captain of the Emperor's Children Legion's 17th Company, during the Horus Heresy and like most of its members he had embraced mutilation, hedonism, and body-modification.[1a]
Shortly after the Dropsite Massacre, Kalimos was among the Legion's Brotherhood of the Phoenix, who came to a meeting called by Captain Lucius and were convinced by him that a Daemon has possessed their Primarch Fulgrim. Incensed at the idea[1a], the Brotherhood devised a plan to ambush the Primarch aboard the Strike Cruiser Andronicus, when Fulgrim was due to visit the lab of Chief Apothecary Fabius[1b], and then find a way to force the Daemon to leave his body[1a]. However, during the ambush, Fulgrim proved himself to be a deadly opponent, despite being vastly outnumbered and seriously wounded Kalimos. Though the ambush was successful[1c], Kalimos's body had to be biologically restored by Fabius and Fulgrim was tortured to free him of the Daemon's control. However, the Primarch quickly revealed that his capture had been a ruse and easily freed himself[1d]. The Primarch admitted that while his body had been controlled by a Daemon, which happened after Fulgrim's shock at killing his brother Ferrus Manus, this had allowed him to come to a better understanding of the powers given to him by his worship of Slaanesh. This later allowed the Primarch to retake control of his body and Fulgrim stated that he was now ready to share the secrets he had learned with his Legion.[1f]
Later, Kalimos was part of the combined force of Emperor's Children and Iron Warriors that journeyed into the Eye of Terror in search of the Angel Exterminatus. While en route, they discovered the Iron Hands Strike Cruiser Sisypheum, which had been damaged and vulnerable to attack. The Emperor's Children aboard the Andronius attempted to board the vessel, while the Iron Hands attempted to repel them.[2a] Eventually Frater Thamatica was able to restore the ship's motive systems, ramming and destroying the Andronius.[2b] As a result, Kalimos was cast into the vacuum of space. Although he survived and was brought onto the Iron Blood, he succumbed to his wounds and died.[2c]