An excerpt from the text that suggests Kovaloff has not learned anything from his experience is: "He returned joyfully, and regarded with a satirical expression two officers who were in the shop, one of whom possessed a nose not much larger than a waistcoat button."
Here the character, a Major who lost his nose, is seen doing the same he did before his experience: joyfully shopping and mocking others, as though nothing happened. His personality is still arrogant and judgemental.