The Russian Blue is a curious and tranquil animal. They are known for their friendliness and intelligence and are somewhat reserved. They have been known to play fetch and open doors, and are sensitive to human emotions. They enjoy playing with a variety of toys and develop loyal bonds to their loved ones and other family pets. They are generally considered to be a quiet breed but there are always exceptions. They are normally reserved around strangers, unless they are brought up in an active household. Many Russian Blues have been trained to do tricks. They can also be fierce hunters, often catching rodents, birds, rabbits, small mammals, or reptiles.
Russian Blue kittens are energetic and require adequate playmates or toys as they can become mischievous if bored. They have exceptional athleticism and rival even Abyssinians for their ability to leap and climb. Slow to mature, Russian Blues retain many of their adolescent traits both good and otherwise until they are 3–4 years old and even much older Blues can be easily enticed into play by their owners. Russian Blues are also highly intelligent. They have an excellent memory and will learn the hiding place of favorite toys (e.g., laser pointers) and lead their owners to them when they want a game. They also have a keen ability to remember favorite visitors and will race to greet familiar faces even if quite some time has passed between visits—a radical departure from their normally very reserved behavior around unfamiliar people.