weight 0.6 is best.The sample image below uses the model "yesmix".
prompt : meer campbell, 1girl, star hair ornament, hair ornament, pink hair, long hair, gloves, leotard purple leotard, white leotard, large breasts, <lora:meerCampbellGUNDAM_v1:0.6>, skirt,
prompt : meer campbell, 1girl, star hair ornament, hair ornament, pink hair, long hair, gloves, leotard purple leotard, white leotard, large breasts, <lora:meerCampbellGUNDAM_v1:0.6>,negative prompt : +(skirt:1.5)