How should I treat a younger dragon? I'm a Gemini Dragon. And my baby sis is a Taurus Dragon.

I love my little sis, she's 3 years old. But she keep copying what I do! And she talk too much. And I thought the Gemini should the talking..... She look up to me, and I do like to leader sense I'm the oldest of other siblings but to me "a dragon with another dragon will have troubling situations between themselves." my mom is also..a dragon. So I got other worries with her..competition I guess. I'm born in the year of the Gold/white metal dragon. My little sister is born in the year of the water dragon. What are the traits of a Water Dragon?