Chaewon (bob hair) -> Chaekyung's part
Naeun (white/red knit vest) -> Yena's part
Chaekyung (black hair, white top) -> Jinsol's part
Jinsol (tallest, grey jumper with white text) -> Naeun's part
Yena (blue shirt tucked into jeans) -> Chaewon's part
Rachel (light hair, dark blue top) got her own part, which I think is sort of cheating, but also makes this more hilarious.