|"A winged figure clasping a chalice"|
|Successors of||Blood Eagles|
|Homeworld||Implied to be fleet-based|
The Red Seraphs are another Space Marine Chapter of which little is known, like most Astartes Praeses chapters. They've mainly been mentioned in the Imperial Armour books, getting most attention in the Orphean War book, and a short story named "tradition" by Aaron Dembski-Bowden, where it is revealed that the chapter honours it's dead with interrement in ornate sarcophagi located in the "beautiful bowels of their warships". The same author also revealed in an interview that this chapter is the "Triarchy" member created by John French, and describes them as "the Renaissance and the artistry of Rome in power armour. Their armour is ornate, they try to overcome the Flaw in their gene-seed by amplifying their angelic qualities and focusing on mental and spiritual purity". Basically what the Angels Penitent used to be.
They used to share a strange tradition with their fellow Triarchy members: every century or so a warrior from each chapter would reunite on a dead world to speak of their chapter's past, present, and future. But as the Great Rift makes the present ever more dire, and the future ever more uncertain, the three chapters have decided to leave tradition behind and join their fleets to take the fight to the ennemy.
- Dark Marches Crusade (610-760.M36): Three companies take part in the crusade, helping the Imperium claim 600 worlds and establish several new sectors.
- Aegisine Crusade (M39): Chapter takes part in the Black Templars crusade and picks up their Iron Cyclone Drop Pod manouver.
- Battle of the Gorgon Deeps (761.M39): Alongside the Revilers they help Battlefleet Orpheus destroy an Ork invasion force.
- Magdellan Prime Civil War (143-151.M41): Part of the relief force alongside Sons of the Kraken and Fire Angels to help the Sisters of Battle, they arrive just as the Sisters launch a counter-attack on the Chaos cultists.
- Orphean War (991.M41 - Present): Entire chapter moblizies to fight the Maynarkh Dynasty. They form part of Battlegroup Salvation, the Imperial force tasked with establishing a cordon around the ravaged Orpheus sector in the aftermath of the Orphean War.