I got a Вопрос for ya, lets see if Ты know the answer.

So, I've been her for about a week now and I HATE most of you....jkjk Some of you. I won't name them idiots. I am not Charlie, lets see if Ты know your fanpoppers.

Hints:

I am Gabriella's cousin
I am 15 years old
And
I am an aquarius.

Who am I?