Actually for me the problem is not with the character but with the compositions of the panels.
Your drawings are nice and your characters are different enough, but when you draw a comic there is some rules you might want to follow so the readers can understand the action and where the characters are.
Here I tried to do a quick drawing to help understand what causes the problems (I actually spend a while thinking about this haha, composition is tricky) :
First of all, as you can see, in the second panel, the action lines were in the wrong direction. She turns her head to the right, so the line should guide the movement. I also add her friend behind so we might understand better were we are)
On the third panel, what I add is not necessary but I thought it would be easier to understand that the person who's talking is not on the set with the bubble lines going out of the panel (and as the girl in her costume is somewhere to the right, the bubble should point to the right).
On the fourth panel, the girl in her costume was in the wrong direction (it might be easier for you to draw a rough plan of the top of the set to understand better where are the characters, and where they goes).
Also it's better to keep the sister to the right in the different panels, because it's easier to recognize her right away (you might understand better why by reading this) . I add her shoulder, it's not necessary but I think it's more readable.
In the last panel I had to change the posing because I changed the direction of the character in the previous panel, so she would have been in the other way, not looking at her sister anymore.
And that's it, I hope this will help you
Composition is really hard, I have myself a lot of hard time with it, I think drawing a comic is 80% about thinking of the composition (which makes me sad cause it's really a pain in the ass).