These were some background characters I created for that fourth page of my Babylon 5/Doctor Who crossover
. They come from the science fiction book series by Lois McMaster Bujold about Miles Vorkosigan.
Miles Vorkosigan (aka Naismith) is the son of a highly placed noble family from the planet Barrayar. He suffered from some pre-natal damage to his bones, which left them incredibly brittle and easily broken. Barrayar had suffered a lot of genetic mutations in it's past, and was not very kind to his deformities. Despite his limits, he pushed forward, achieving a military career in Barrayar's Imperial Security. His main role in Impsec was serving as Admiral Naismith, the commander of the Dendarii Free Mercenaries. Galactic politics makes it hard for a government military force to travel freely though a lot of start systems, but a mercenary fleet does not have such limitations, which made them very useful in forwarding Barrayar's interests.
Sargent Taura is the product of genetic engineering to create a perfect solider. The program was deemed a failure, since the other members of her batch had died early. Naismith rescued her from her creators, who had left her to die in a dungeon, and she soon proved herself an impressive soldier in the Dendarii.