A LoRA weight of 0.8 works great, though you can adjust the strength as you prefer

Prompts I usually used:

• kairi_kh, red hair, short hair, blue eyes, black choker, white tanktop, sleeveless, purple straps, navel, purple belt, pink skirt, kh1outfit

• kairi_kh, red hair, medium hair, blue eyes, pink dress, white top, white straps, black belt, sleeveless, bracelet, zippers, kh2outfit

• kairi_kh, red hair, short hair, blue eyes, pink hoodie, hood down, pink skirt, black belt, sleeveless, black trim, bracelet, kh3outfit