Without "Flatlander" bodypaint, his brown eyes show no discernible slant and his yellow-brown skinned features are a blended fusion of Earth's many races.
Upon reaching Fafnir, Feather shot Shaeffer in the chest with an ARM punchgun, but Carlos managed to escape with Tanya and Louis.
Eventually, Beowulf recovered, was reunited with Sharrol, and had two more children with her, Jeena and an unnamed second child; therefore, Louis has one sister and two half-siblings, who grew up on the Home colony world.
He lost the election but in the process of running learned an oratorical technique he would later use to attempt to convince Teela Brown not to come on what would later turn out to be the first Ringworld expedition.
He awakens on a very expensive FTL singleship near Known Space, physically younger than he recalled, unaddicted (the ship refuses to provide him with alcohol or pills), and without recollection of how he came to be in this situation while several months away from Sol and Wunderland.
In terms of in-universe chronology (falling in-between Betrayer of Worlds and Ringworld), Wu later appears in the short story "There Is a Tide", where he becomes the first human to make contact with the Trinoc species.
After one of his booth transfers gets diverted to a hotel room, he accepts an offer to go on an expedition with three other members – two aliens (a Pierson's Puppeteer named Nessus, and a catlike Kzin called Speaker-to-Animals) and Teela Brown, a human female supposedly bred for luck.
When Louis comes up with an ingenious way to get them home, he is rewarded by the Puppeteers with the "Quantum II Hyperdrive", capable of moving a spaceship one light-year in 1.25 minutes.
He decides to save the Ringworld with Speaker-To-Animals (renamed Chmeee) and the Hindmost (after Louis destroys the hyperdrive motor, trapping them there again).