Potential face claims for Cho Chang:

NAME: Katie Leung
DATE OF BIRTH: 8 August 1987
NATIONALITY: British
EYE COLOUR: black
HAIR COLOUR: black

NAME: Zhang Xinyuan
DATE OF BIRTH: 5 December 1990
NATIONALITY: Chinese
EYE COLOUR: dark grey
HAIR COLOUR: black

NAME: Arden Cho
DATE OF BIRTH: 16 August 1985
NATIONALITY: American
EYE COLOUR: brown
HAIR COLOUR: dark brown/black

NAME: Jing Wen
DATE OF BIRTH: 1993
NATIONALITY: Chinese
EYE COLOUR: dark brown
HAIR COLOUR: black

NAME: Liu Yifei
DATE OF BIRTH: 25 August 1987
NATIONALITY: Chinese
EYE COLOUR: dark brown
HAIR COLOUR: dark brown

NAME: Moon Ga-young
DATE OF BIRTH: 10 July 1996
NATIONALITY: South Korean
EYE COLOUR: dark brown
HAIR COLOUR: black/brown

(suggested by ghostfalls- and kencbi)