Ateez 9th member (Hiatus)

Hair Evolution

                         Pirate king
                                 &
                          Treasure:

Sunhee's hair was dyed in a dirty blond kind of shade. Her hair would be styled into ponytails and half down half up so it was easier for her to dance.
                           
   

                     Before Hala Hala
                                 Era:

Because her dyed her hair coming off, her hair was a light brown color on the  top while some of the ends of her hair were blonde. For this time she would usually leave her hair down or do a messy bun.

                          Hala Hala
                                  &
                       Say my name:

For this era her hair was dyed into a dark chocolate shade which would almost look like black with bangs. Her would be left down or just in a low ponytail.

      
                             Illusion
                                   &
                               Wave:

Her hair was in a orange and coral shade on top while mid-way to the ends it was a kind-of-neon pink shade.
Her hair was either into curly beach waves or just straight. She would have her hair down and sometimes during promotions with hair rings on some parts if her hair.

                        Wonderland:

Her hair was dyed into a maroon color with no short bangs. Her straight hair would be styled into a high or low ponytail or just her hair down.

       
Answer
Era:

First this era not all members dyed their hair except for Sunhee. The female had wanted to try the hair color for a long time and for this era KQ finally gave her permission. Her hair was styled in low or high ponytails with her bangs to the side.