noun
poster girl; image girl
A young woman chosen to represent a brand, product, or event in advertising and promotional campaigns; similar to a spokesmodel or brand ambassador.
wasei-eigo (Japanese-coined English), from image girl
彼女は新しいビールのイメージガールに選ばれた。
She was chosen as the poster girl for the new beer.
そのイベントのイメージガールは、明るくて親しみやすい人だった。
The image girl for that event was cheerful and approachable.