Which female idol has ...

Dahyun and Rose dye their hair a lot...

SNSD Hyoyeon maybe

i don't remember the last time rosie had black hair

Quote from selfmate

i don't remember the last time rosie had black hair

I think predebut actually

Quote from selfmate

i don't remember the last time rosie had black hair

When her stylist said she sometimes gets her hair bleached 3 times a week. How dead is her scalp at this point.

Hyoyeon. She dyes her blonde hair every 10th day

rosé

Dreamcatcher Yoohyeon. She doesn’t keep her natural black hair really often.