Igor is a Russian Cosmonaut in Solaris.
In the Odd Job, Igor requests Crypto (disguised as fellow cosmonaut) to get rid of the Blisk once and for all. Crypto snaps and tells him the Blisk are no more, but Igor insists you to do it anyways. It turns out he was right about the remaining Blisk and Crypto goes and searches for them.
At the end of the Odd Job, Igor writes in his notebook that they have freedom at last, but they have no word from home. Him and the other cosmonauts are expecting to be rescued.