What defines them
An elegant cat with a silvery blue-gray coat and green eyes, the Russian Blue is calm, discreet and very sensitive. He bonds deeply with his small circle and is shy, sometimes fearful, with strangers and changes. He likes routine, high places to observe from, and hates shouting. An intelligent player, he learns fast, but at his own pace. His reserve makes him easy to misread: his caution gets taken for fear or indifference.