The Chapter Master of the Flesh Tearers. Gabriel Seth is a very brash, blunt and fearless leader. Before the conclave, Seth led a campaign against the Companitas, a rebellious group of civilians on Eritaen. He once hated the fact that the Blood Angels were a first founding chapter and voted against Dante's tithe of initiates after arriving at the conclave on Baal. After being saved by Dante from a mutant about to throw him off a cliff, he realizes that they are all brothers not cousins and agreed with the tithe.
The Flesh Tearers Chapter was created in the 31st Millennium after the Primarch of the Ultramarines, Roboute Guilliman, who led the reformations sweeping the Imperium after the Horus Heresy, determined that all of the existing Space Marine Legions would be broken up into 1,000-man Chapters so that no single commander could ever again wield the power of an entire Astartes Legion. This event is known as the Second Founding and the Flesh Tearers were one of the Chapters formed from the Blood Angels Legion. The Flesh Tearers' reputation for savagery in battle was soon well-known, and so the terrible Flaws of the Blood Angels' genetic legacy must have asserted themselves very soon after the death of the Blood Angels' Primarch Sanguinius during the Battle of Terra. In the wake of the Horus Heresy, as the forces of the Imperium moved to put down the remaining pockets of rebellion, the High Lords of Terra chose to ignore the Flesh Tearers' bloody reputation in favour of their remarkable efficiency at subduing rebellious worlds during the Great Scouring.