You were the last Primarch to be found by your mother, the Empress, in the remote planet of Solaris, which is in a system whose star is black, there your legion out of your geneseed are called the Eclipse's Walkers. Unlike your sisters, you are male, the only male Primarch of the Imperium.

Your genes didnt go as well as your sisters, making you a bit shorter at 8 feet while your sisters are around 11 feet, your mother standing at 14. You compensate this with an inmense Psyker prowess and a great tactician mind, as well as being adored by your daughters, being a proud father of a legion

Today all of you and some Terran High Lords are reunited and hosting a party at the Imperial Palace, this due to the ascension to War Master of one of your older sisters, Isis Lupercal

You are the last to arrive, and when you enter all eyes are on you as you sit between Freya and Isis