Is the person singing the song one of the nine?
I suggest a formation of 9 people for reference only
First, go out in a row, and then move forward with people one in and out to form a formation of 4 in the front and 5 in the back. (If the singer also dances, let her stand at the front in the middle, forming a formation of 1, 3, and 5)
Then when the formation of 3, 3, and 3 climaxes, you can surround A circle or something like that
During the interlude of the song, you can turn your back to the center and back of the stage and make a tight triangle of 1, 3, and 5
Then turn around and continue. Dance the same dance as the first paragraph
I wish you success~~