Igor is a male Siamese or Birman cat that appears in 44 Cats. It's confirmed that Lampo, Meatball, Milady, and Pilou are his friends. In the lost recipe incident, it’s hinted that Igor is the toughest cat in town.
Igor is good friends with the cats. He is a good cat and he loves to help.
Also in one episode, Igor is shown lifting a makeshift weight, made of a bar holding two car tires.