In order of appearance:
Lord Karag Demetrion, Siegemaster of the Spited, leads his Warband from the Space Hulk Poliorcetes.
Makair Varok, Legionnaire, 12th individual to wield the Plasma Gun ”Forgemaw”, rumoured to have been used during the battle known as the Iron Cage.
Nazor The Whispering, Havoc, habitually silent save for whispering the names of tank crews slain by his daemon-possesed lascannon.
Lhughas Drol: Aspiring Champion, claims to have fought in the Great Crusade and has a particular loathing for Orks.
Xhor Gatar, Havoc, keeps a constant video-record of all battlefield engagements.
Ner Vol-Tras, Legionnaire and suspected Khorne devotee, is banned from using a jump-pack by order of Lord Demetrion.
Akos Trenchbane, Chosen, favours drop pod assaults directly into enemy trench lines.