Schuyler "Sky" Haussmann is the son of Titus Haussmann, the head of security aboard the Santiago.
However, Sky discovers that he is not in fact his father's son, and was an infant "momio" or "sleeper" awakened by Titus secretly after the death of his own son. Like the rest of the Flotilla's sleeping colonists, Sky Haussmann is secretly immortal.
Sky's greatest crime and best-known action was the ejection of entire rings of reefersleep caskets in order to gain an advantage in speed over the other craft of the Flotilla, killing many of the momios that were to be the colonists for the new world of Journey's End. This strategy meant the Santiago had less mass than the other ships and so could decelerate later and arrived at Journey's End first.
The planet which had been known as Journey's End to the Flotilla was christened Sky's Edge as a reminder of the action he took to ensure that the Santiago would be the first of the Flotilla to arrive, which led to a continuous civil war on the planet. Because of his crime, Haussmann was crucified after the other colonists landed on Sky's Edge.
Sky Haussmann is the centre of a pervasive cult, and those who worship him do so as if he were a god. This bizarre cult has developed an indoctrinal virus that alters the infected's perceptions, often giving them physical symptoms similar to stigmata or whole chapters of Sky's life as simulated experiences. The virus is designed to reprogram the victim, in a sense.
Cahuella
- Main article: Cahuella
It is revealed that Sky managed to get a stand-in to be martyred, while Sky himself entered reefersleep for several decades. Sky eventually assumed the identity of the reptile hunter Cahuella, and amassed a significant wealth by selling weapons to both sides in the civil war.
Tanner Mirabel
- Main article: Tanner Mirabel
After Cahuella is deemed a war criminal, he hires Tanner Mirabel as a security specialist to protect his wife, Gitta. When Gitta is accidentally killed by Mirabel during an ambush by Argent Reivich, Cahuella trawls his memories and imprints them on himself, assuming Mirabel's identity and fleeing the system to seek revenge on Reivich. Tanner Mirabel himself is torturted and left for dead, but he survives and pursues Cahuella.
After Reivich and the real Mirabel are dead, Sky takes up residence in Chasm City and continues to operate under the name Tanner Mirabel. Six years later, he has again become wealthy, by founding the company Omega Point and establishing the assassination game Shadowplay. He recruits Ana Khouri for the game, which leads to her eventual recruitment by the Mademoiselle.
H
- Main article: H
Several years later, now calling himself simply "H", Sky Haussmann has killed and replaced the Mademoiselle for the "greater good of the galaxy", and uses his new power and influence in Chasm City to atone for his earlier crimes.
Haussman captures Nevil Clavain and convinces him of the best course of action to combat the Inhibitors. By aiding Clavain in his efforts to set up the expedition, H is largely responsible for the successful evacuation of Resurgam and Clavain's efforts to save most of humanity.