Intelligence agencies often assign code names to their agents and assets in order to hide their true identities.
Sometimes those assets are important political figures seeking their nation’s top posts. Want-to-be leaders have often had to take aliases to hide their true identity until they are ready to take power.
Taking Russia as an example, Vladimir Ilyich Ulyanov, of course, took the nom de guerre of “Lenin,” after the Lena River in Siberia.
Ioseb Besarionis dze Jughashvili called himself Stalin, the “Man of Steel.”
In keeping with this custom, Russia’s intelligence service, the FSV, has given their most important asset, Donald Trump, the pseudonym “Linen,” because they can fold him up and keep him in a drawer until they need to take him out on special occasions.