The Russian

The Punisher: Welcome Back, Frank
The man known as the Russian was hired by the crime boss to eliminate the  the Punisher. He located him while Castle was moving out of his latest safe house, still recovering from severe wounds suffered in a previous battle with the Gnucci army. Almost unarmed and weak, Castle was beaten severely by the Russian, who took the chance to enlighten the reader about his views on capitalism and American comic heroes and enjoyed the exercise immensely. During the course of the fight, though, Castle learned that the hired killer had a serious aversion towards hot things and later, when he was thrown through a door into his obese neighbor's (A man aptly named Mr. Bumpo) apartment, he used a very hot pizza to blind the Russian and then crushed him beneath, until he died of asphyxiation.