weight 0.7 is best.
I created this LoRA as requested.

Please read the description.

outfit1
aatama, short hair, blue sailor collar, red neckerchief, white shirt, short sleeves, navel, white shorts


outfit2
aatama, short hair, hair ornament, black sailor collar, sailor shirt, animal print, short sleeves, black gloves, belt, black skirt, black thighhighs


outfit3
aatama, short hair, green sailor collar, red neckerchief, black sweater, long sleeves, green skirt, black pantyhose

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