Christine
A chorus singer at the Ankh-Morpork Opera House, Christine is a pretty, thin blonde with a tendency to wear white and use exclamation points at the end of every sentence. She is actually an extraordinarily untalented singer, but the management favors her for her beautiful appearance (and the fact her father has donated a good deal of money) and has her lip-synch on-stage to the voice of Agnes Nitt, otherwise known as Perdita Nitt. She is friendly and kind but not particularly bright and can be unintentionally slighting. She rarely pays attention to anyone but herself.
She is a beneficiary of the sad fact that star quality is a far rarer commodity than talent. The "Phantom" in the story accidentally tutors Agnes instead of Christine when Christine runs away from the ghostly voice coming from her mirror. Agnes realizes what is happening and, in order to continue her training for a second night, she slips some herbs into Christine's hot milk to make her sleepy.
Christine's father told her that a "dear little pixie" would help her career, and she thinks Agnes might be that pixie.
Read more about this topic: Discworld Characters