Seth-Iavow had originally planned on becoming a Seraphim warrior, but his application was rejected because he was extremely strong in The Way, a talent that could not be wasted. Over the centuries, Seth-Iavow became a Seraphim Elder and eventually a War Leader.
When QAI notified the Seraphim that Black Sun was going to fire, and that the side effect of that action would be the creation of a "soft spot" in the Quantum Realm, it fell upon Seth-Iavow to lead the invasion.
Seth-Iavow's plan worked to perfection, and Earth was quickly conquered. Although the destruction wrought by his warriors causes him pain, Seth-Iavow's strong connection to The Way prevents it from overwhelming him.
Designed and constructed by Dr. Gustaf Brackman, QAI is a Quantum AI that is capable of calculations on an unimaginable level. When QAI was constructed, Dr. Brackman incorporated pieces of ancient Seraphim technology into its designs; the technology made it possible for the QAI to operate across the Quantum Realm. Unfortunately, once QAI entered the Quantum Realm, the Seraphim were able to detect its signal. After the Seraphim realized what the signal represented, they slowly began to reprogram QAI. Knowing that QAI was valuable as an intelligence-gathering device, the Seraphim ordered QAI to serve Brackman, all while reporting Brackman's every move.
When Black Sun fired, QAI openly betrayed Brackman; from that point on, it was commanded by the Seraphim.
Second in command, you face him in the third Forged Alliance mission, and kill him in the sixth. His left eye and a portion of the surrounding face have ben replaced by cybernetics, presumably the result of a wound sustained in battle that would have otherwise killed him.
The first Seraphim you encounter. He was partnered with Gari to
assault and destroy Forte Clarke, directly east of its position. He viciously attacked and overwhelmed its defenses, but is killed in the process, with Fort Clarke still intact.
Killed during the third Forged Alliance mission. He was staged North of Princess Burke's Temple, directly assaulting it. He appears to be a lower-ranking commander, since he didn't have the construction capabilities of the Ahwassa Experimental Bomber Thel Uuthow had. Also, just being with the second-in-command of the Seraphim army means he could have been a Commander in training.
Creates a trap on planet Hades, during the fourth Forged Alliance mission. While the player manages to escape, he does not kill Oum-Eoshi. His subsequent failure to reappear suggests that he survived the Coalition's successful campaign to reseal the Quantum Rift, although it is possible that he was hunted down by human forces thereafter.