What kind of person is a Gemini?

Can you tell me, what specific qualities and traits are typically associated with someone who is a Gemini? Are they known for being social butterflies, or do they prefer their own company? Are they decisive or prone to indecisiveness? Are they naturally curious and adaptable, or do they struggle with change? And how does their dual nature, often associated with the Gemini sign, manifest in their personality and behavior? I'm eager to learn more about the characteristics that define a Gemini individual.