Felix Karasev or Felix Sutyrin was a KGB General and Soviet diplomat. He served three times in Finland between 1963 and 1992. His memoir Naapurinpojan muistelmat (ISBN 951-1-14352-2) was published in 1998.
Both Vladimir Putin and Sergei Ivanov worked for Karasev when he was in the Leningrad and Leningrad Region Directorate of the KGB.
References
Felix Karasev Wikipedia(Text) CC BY-SA