I have to be a Secret - Star vs. the force of evil [FF]

About her

The stairs lead to a big hall. There stand the thrones. River sit down.
<<Mom who is she still asleep?>> Star asks angry. <<And why is she sleeping? Who ist that girl and why did you know her and I don't?>> Moon breaths. <<This girl was a guardian of Mewni. She has a strong magic and some people was afraid of her power. I als well. She wanted it. And she should awake soon. I knew her because I had give her the Titel. And you don't know her because I set her asleep long before your time>> Marco and Star are confused of this answer. <<Why could she use magic?>> Marco asks. <<She was very interested in it and the Butterfly family. She taught it herself>> <<That's possible?>> Marco asks but Moon didn't answer.

At the same time in the secret room.
The girl awakes. She hold her head, looks around. <<It's my room. Am I still asleep? No I can't. This couldn't be a dream. I can't dream. That mean I'm awake. But why? Oh no ... queen Moon!>>
She jumps up in her sleeping clothes and running downstairs. She's concentrated until she steps on the last stair tread. She noticed Star.
<< Good you are awake>> Moon tell her. She pointed on Star <<This is my daughter Star Butterfly>> The Girl stare at Star << Oh I understand>> She says and goes to Star and bow down.
<<That's not needed>> Star tell her. <<But you are the princess>> She explains. <<That's really don't needed. This is Marco>> Marco says hallo. <<You should go upstairs and dressed your self>> Moon says. The girl turn around to the stairs. <<Wait!>> Star screamed. <<What's your name?>> The girl tuned around <<Cherry >> she went upstairs. <<Cherry? I heard this name somewhere. But where?>>