The
小 + character pattern (
小李,
小王,
小红) is the standard Chinese way to make a friendly diminutive — equivalent to English nicknames like "Lizzie" or "Bobby."
纯 (chún, "pure") suggests innocence and is a stock character in girls' given names;
小纯 reads as a soft, affectionate form of names like
纯子,
纯儿, or
纯纯. Also commonly heard in Chinese-dubbed Japanese drama for the name Jun (
純/じゅん).