Dan Sylveste -- son of Calvin Sylveste and a member of an enormously wealthy Yellowstone family of scholars and industrialists -- was the driving force behind the Resurgam expedition and the original leader of the colony. He was an archaeologist studying the ruins of the ancient Amarantin, convinced that their history held the key to why no alien species had yet survived long enough for humans to make contact. It eventually became apparent that Dan was a biological clone of his father, an immortality contingency plan that was never enacted.
Dan was a driven man who had come closer to penetrating a Shrouder enclave than anyone else living, but it was only after that experience that he developed an interest in the Delta Pavonis system. After settling Resurgam his investigations eventually revealed that the scouring of the entire planet's surface by a coronal mass ejection -- from its otherwise stable star -- coincided with the period in which the Amarantin were gaining spaceflight.
After a pair of coups oust him and then his replacement from office, Sylveste's ability to research his theories was nonexistent; and after the latter coup his replacement eyes were greatly damaged.
The Nostalgia for Infinity arrived in the system eight months after the latter coup in 2566, searching for Dan Sylveste so that he could heal Captain Brannigan, with the help of his father's beta-level simulation. Sylveste was taken aboard the ship, which he had been on board before one-hundred and six years earlier, in the Epsilon Eridani system. Once he was aboard, traces of the Sun Stealer entity that had been aboard since that previous visit were able to gain influence over the ship and Sylveste. Fighting broke out for control of the lighthugger.
Sylveste unwittingly -- under the influence of Sun Stealer -- awoke the Inhibitors to the existence of mankind, by triggering the inhibitor device left near the Hades object. Too late Dan realized he was no longer in control and tried to destroy himself and the Inhibitor artifact with anti-lithium 'hot dust'.