Sergei Tolmasov
Fictional Character
A World of Difference
POD: c 4,500,000,000 BCE;
Relevant POD: AD 1976
Type of Appearance: Direct POV
Nationality: Russian SSR, Soviet Union
Religion: Atheist
Date of Birth: Early 1950s
Occupation: Cosmonaut, pilot, soldier
Parents: Konstantin Tolmasov
Relatives: A brother, three sisters
Affiliations: Communist Party of the Soviet Union, Soviet Air Force

Sergei Konstantinovich Tolmasov was a Soviet cosmonaut who commanded the Tsiolkovsky during its mission to Minerva in 1989. He had been trained as a combat pilot but had never seen combat; he had been transferred out of his squadron of MiG-27s several months before they saw action against the US Sixth Fleet's Tomcats during the Third Beirut Crisis.

Throughout his time on Minerva, Tolmasov tried to resist pressures to support Hogram, the domain-master of the territory he'd landed in, in his war against Reatur, whose territory hosted the American shuttle Athena. He also tried, with limited success, to remain on friendly terms with Emmett Bragg, the Athena's commander.

After the war between the Omalo and the Skarmer ended in Skarmer defeat, Tolmasov had to remind Hogram of how reluctantly he'd been forced into supporting the war.