Aaaà aaaà aaaà h that's fair thanks for hearing me out that's very kind of u. Now 1st things 1st she could wear a top hat and cane because every character looks better with a top hat and cane. She could also have shorter sleeves with a long skirt. Long skirt because 1st off it's a trope for women in general who don't want to be subject to the male gaze. So it's a cool redesign element in general. But u could also put symbols of Bill Cipher on it. While the shorter sleeves could be used to show bandages and bleeding. Either because she still does the Bipper self harming for fun stuff and/or it implies how much more aggressive her fighting style is now that she's fused with Bill Cipher. Hope these get u interested
Here it is, I usually don’t like when ig characters fuse with bill and gain his outfit but here it is
