From the official site:

Fiona (Rock Name - Fi Fi)

Fiona plays violin (grade 7) and is in the Symphony Orchestra and a small ensemble with fellow Rock School pupil, Camilla. A shy person, she is gradually gaining more confidence. Gene Simmons reputation as a man motivated by women and money bothers her. From her Christian beliefs, she sees this as morally wrong. The Rock School experience gave her an insight into the world of celebrities. She realises now that it's not all easy work, there is a lot of hard and boring bits as well as amazing ones. She understands how easy it would be to get carried away and become arrogant and selfish. As to the customising and styling, this is something she really got a lot out of during the project.