Who is the composer?

After admiring the red diamond which was about the size of her head two times, Alix left the bathroom with a smile. She would make millions from that diamond, she would not be broke anymore, hooray. 

With a satisfied expression on her face, she passed by Jin Kang's office, waved at her and then entered the small classroom which had only five students, three girls and two boys. All of them were of university going age, and all of them had failed to get into prestigious music schools so they opted for her small one.

"Hello teacher Alix." They greeted.

"Hello, everyone." She replied.

There was one piano in the class room, it was used by all the students at different times to practice. Scarlet had never touched it with both hands before, today however, her hands trailed over it and she sat down on the bench behind it.

Facing the confused students, she asked, "How many of you plan to sign up for the winter harmony classic competition?"