Due to the overlapping and chronological connection of these books, certain characters appear several times throughout the Grand Tour, becoming main characters in books that are seemingly unrelated. •
George Ambrose - appeared first as a "stowaway", living in the small temporary shelters on the Moon; it was in one such shelter that he met Dan Randolph, CEO and recent pirate and fugitive. Years later, he appeared at Dan's side as his bodyguard; until the CEO's death. Afterwards, George stayed permanently in the Belt, and soon became well known and respected throughout the region. Before long, he became Head of the Ceres government, guiding the small government through the Asteroid Wars, the Chrysalis Massacre, and eventually the construction of Chrysalis II. •
Kris Cardenas - possibly the most frequently appearing character in all of the Grand Tour, she is a nanotechnologist, the best in the System. She started off very successful in her field, winning a Nobel; but when Zealots and fanatics begin calling a ban for the technology, she has no choice but to escape to the Moon. It was here that she perfected her research, and helped Selene become independent; programming nanobots to extract oxygen and helium-3 from the surface, and to construct Clipperships. Despite Selene's independence, Kris is forever banned from Earth (due to nanobots in her body that constantly heal and rejuvenate her), and can never see her husband and children again. For years this bitterness boiled, until she helped Martin Humphries design a batch of nanobot that would disable Randolph's ship, thus preventing him from helping the Earth that was in dire need of materials. Kris was eventually caught and convicted, and soon left the Earth-Moon system for the Asteroid Belt, where she never practiced nanotechnology. She would stay here for a few years, until the space habitat Goddard passed by; picking her up at Holly Lane's request, and taking her out to Saturn. From there she began to uptake nanotechnology again to help the new colony. •
Malcom Eberly - Though he only appeared in
Saturn and
Titan, he played the leading role as a power-mad mastermind who brilliantly negotiated his way to the top of the government of Habitat Goddard. •
Lars Fuchs - Champion of the Rock Rats, he was introduced as a nervous college student in The Precipice, where he met his wife Amanda. After the death of Dan Randolph, the newly weds became one of the first prospectors of the Belt, and eventually started a business to supply miners. The company is then driven out of business by Martin Humphries, as Fuchs reacts by hunting down and destroying the Billionaire's ships of ore, leading to the First Asteroid War. For decades Fuchs would play cat-and-mouse games out in the Belt with Humphries' hired assassins; until the 10-billion dollar rewards for the return of Alex Humphries body from Venus appeared. Bent on getting the reward, a sort of payment for all that M. Humphries has done to him. He dies shortly after succeeding his mission, due to the help of his long-lost son, he never knew he had. •
Martin Humphries - the ultimate antagonist of the Solar System, he is a cold-hearted, utterly oppressive and dominant, multi-billionaire that destroys or takes over corporations in order to add more money to his massive hoard. He was behind the death of Dan Randolph, created an aerospace industry just to thwart Astro Corporation when it was run by Pancho Lane, stole Lars Fuchs' wife, Amanda Cunningham, and hoped that his "own" son would die in a self-righteous mission to Venus. Also known by several names including Humpy, Marty, 'The Humper' and 'The Hump'. He is somewhat famous in the Grand Tour universe for his massive underground palace on the moon, where he will often hold extravagant parties. •
Priscilla "Pancho" Lane - Playing a large role in the entire Asteroid Series, she was aboard the first crewed ship to reach the Asteroid Belt, and acted as the guardian of her sister, Holly Lane, who became the main character of Saturn and Titan. Pancho herself was a large part of the novel
Titan, and appeared several times throughout the Grand Tour, following
The Precipice, where she first appeared. •
Dan Randolph - protagonist in
Powersat,
Empire Builders, and
The Precipice, creator of Astro Corp. He was arguably the ignition for the entire Grand Tour. A somewhat cantankerous but good-hearted industrialist and idealist who believes that the future of humanity can be assured by tapping the resources of the Solar System, particularly the mineral wealth of the
asteroid belt. •
Douglas "Doug" Stavenger - Founder and leader of Selene, a self-sufficient country on the Moon. He was injected with experimental, general-purpose, healing nanomachines after a massive overdose of radiation, and thus could not return to Earth for fear of assassination by "The New Morality". He appeared in
Moonrise, was a prime protagonist in
Moonwar and continued to have a say in many off-Earth affairs well into the Asteroid Series. Even after stepping down from his position in Selene and no longer holding any official position of authority, he still held considerable power and influence through the entire Solar System. •
Raoul Tavalera - appearing in
Jupiter,
Saturn and
Titan, he played several quiet, backstage roles, seemingly always finding himself caught in the worst situations. He takes on a more prominent role than usual in
The Return. •
Jane Thornton - Appeared in
Powersat and
Empire Builders, mentioned in other books, wife of Morgan Scanwell and love interest of Dan Randolph. She eventually becomes
President of the United States. She is killed at the start of the Asteroid Wars series. •
Jamie Waterman - An underdog Native American geologist who became the recognized leader of all things related to Mars, acting as the protagonist of the three "Mars" novels. ==Recurring organizations==