Chelsea Halfpenny
Halfpenny's professional acting career began in 2004 when she appeared in "Casualty" episode ""What Parents Do"", playing an eleven-year-old girl called Karine.
Lily Chao
Lily Chao is a fictional character from the BBC medical drama "Casualty", played by actress Crystal Yu. She first appeared in the series twenty-eight episode "Bedside Manners", broadcast on 3 August 2013. Lily arrives at Holby City hospital to resume her second year of the Foundation Programme. Yu had previously appeared in the show as a separate guest character. She also decided to learn certain medical procedures to make her character believable. Lily is characterised as an ambitious junior doctor and intelligent high-achiever. Lily is good at her job but lacks any "bedside manner" and her no-nonsense attitude causes problems with colleagues and patients alike. The character was originally working towards a career in dermatology but becomes accustomed to the variety of work the Holby City's Emergency Department has to offer.