weight 0.9 is best.

This model is based on the SDXL Pony Model.

I created this LoRA as requested.

outfit1-1 (long sleeves, capelet)
aarias, long hair, red hair, ahoge, blue eyes, large breasts, school uniform, black capelet, neck ribbon, white shirt, long sleeves, underbust, miniskirt, purple skirt

outfit1-2 (short sleeves)
aarias, long hair, red hair, ahoge, blue eyes, large breasts, school uniform, neck ribbon, white shirt, short sleeves, underbust, miniskirt, purple skirt

I uploaded a sample image of the outfit as a post.

In the sample images, used hires.fix and the extension Adetailer.