Baron Veseloffsky is an agent for Soviet Intelligence.
Veseloffsky is a former privileged landowner and aristocrat who lost his positions and his authority when the Bolshevists took control of Russia just shy of a decade before. Rather than suffer the firing squad or the deprivation of exile, Veseloffsky embraced the new cause, at least far enough to satisfy the nascent leadership. And when they discovered just how resourceful and diabolically successful he could be at clandestine work, what he lost in the power shift he recovered in stature in the cloak and dagger world.
Veseloffsky is a villain, at least to those who have to deal with him, and is considered by most to be totally unscrupulous though he does maintain his own set of codes. While he is thought by many to be a "traitor to his class", it looks like Veseloffsky had truly found his niche because he is extremely clever in his scheming and enchantingly glib with his speech. It is said that he walked with "the air of a world cosmopolitan" which is proven by the fact that he is comfortable and at ease no matter where in the world his duties take him.
He is also quite ruthless and will let nothing stand in his way, using extortion, blackmail, kidnapping and even murder be tools of his trade. Now, if you were a part of Soviet State Security, such as working for NKVD, having someone like Veseloffsky is just the sort of thing you would wish for. Except for his own code, he really does not let annoying things like qualms interfere with getting the job done.
Not to mention, everyone he comes into contact with is a tool to be used and he knows how to use tools.