Maloghurst

This ugly son of a bitch probably caused as many problems for the Imperium as Erebus, but he isn't a snivelling bitch so we allow it.

Maloghurst also known as The Twisted, The Bearer of the Eye and The Shadow Hand was a member of the Luna Wolves/Sons of Horus legion and was a major brown noser, foot kisser and very close advisors to Horus during that nasty business.

Great Crusade

During the great crusade Maloghurst served as part of the Luna wolves legion, as a Veteran who would command others on the battlefield where his sharp mind and brutal tactics and saw him favoured by his dad and got him nicknamed "The Twisted". Yeah the guy was known for being so brutal the the Legion that was renowned for using brutal tactics saw what this guy did and thought "that was a bit much." However his fighting days came to a screaming halt when during the pacification of Terra (not that one, a different one also known as Planet 63-19) when his Thunderhawk got shot out of the sky and wrecked on the planet bellow. But some miracle (and perhaps some divine intervention) Maloghurst survived the crash and was able to drag his broken body from the wreck and received medical attention when he was found by the then Luna Wolves assault force attacking the planet. He was pretty much crippled by this event and everyone became very embarrassed about calling him "twisted" after the crash, like having a friend nicknamed wheels because he owns a cool car who then ends up in wheelchair after an accident. But Maloghurst liked the nickname and said he didn't care if people still called him that since he had earned the name and thought it's double meaning was fitting. Even though he was no longer fit to fight in the legion, Maloghurst was still very liked by Horus and his dedication saw him become the bearer of Horus' and the Legions standard, a large iron bound Eye of Horus.

The Horus Heresy

His new model in all his crippled glory (and also the first Heresy character to technically get a model update)

When Horus turned traitor, Maloghurst happily followed his gene-father in Heresy and most of the Sons of Horus against the Emperor. Around this time Maloghurst became the equerry to Horus and acted as an advisor to his Primarch as well as an enforcer and chief of secret police within the legion (for those curious he was the "lining people up against the wall" kind of secret police). He also seems to have fallen to Chaos a lot faster than the rest of his legion as he started studying and using the Warp very early into the Heresy and he also took a book out of that cunts playbook creating his own version of the Gal Vorbak known as the Luperci, just before the battle of Molech (3 years into the Heresy). His status gave him a large amount of power during the Heresy and during the Isstvan atrocity Malaghurst got to boss around Typhus and command him were to attack, much to Typhon's chagrin.

Unfortunately for the crippled bugger his love for his father ultimately was the death of him after Horus was comatose after his throwdown with Leman Russ. Maloghurst was very distraught that daddy had been injured and accepted the help of Lorgar to enter Horus' throne room on the Vengeful Spirit, performing the same rite as Erebus had when Horus had been wounded on Davin at the end of the Great Crusade. Maloghurst entered the warp and found part of Horus' soul that had seen that he had been tricked by the Chaos gods and was having a whinge about the current events and fighting against a bunch of Daemons. Before Maloghurst can reason with the soul shard he is dragged back to the real world by a very pissed off Horus Aximand, who informs Maloghurst that his little warp fuckery session pulled the entire Sons of Horus fleet out of Warp space and into the orbit of a Blood Angels controlled world. Mal was then thrown into a maze to wander aimlessly while the Sons of Horus attacked the Blood Angels, until he was later rescued by the commander of the Catulan Reavers and they both fought their way through the Vengeful Spirit to Horus' throne room. Jumping back into the Warp Maloghurst found the same part of Horus' soul and tried to convince it that the spikey armour and Daemons were cool and that he should accept the Chaos gods. But the soul shard was having none of it, saying that everything was FUBAR and the best thing he could do now was die and stop being the Chaos gods' plaything. Maloghurst realised that the only way to "save" Horus was to kill the last reasonable part of him, so Maloghurst stabbed the shard killing Horus' last shred of remorse (and sense) and himself. Afterward Horus was back and had fully fallen to Chaos and with no regrets or doubt about his path. And we all know how that then turned out.