Regulus ag Sun, better known by his nickname "Quicksilver", is a Silver, and the richest man in The Society, through his vast assets in the Helium-3 processors on Phobos. He owns many midColors including engineers, hackers and pilots, as well as the contracts of two Olympic Knights. He is gay; his husband is Matteo, a Pink.
In Morning Star, it is revealed that he is the highColor liaison for the rebel organization, the Sons of Ares. After being captured and interrogated by Darrow, he volunteers his service and resources for Darrow's cause.
Roque mentioned that he was giving the keynote for a conference on Luna.