weight 0.8 is best.
I created this LoRA as requested.

Please read the description.

outfit1
nami (one piece), long hair, orange hair, brown eyes, earrings, bare shoulders, shoulder tattoo, cleavage, bikini top only, striped bikini, green bikini, bracelet, midriff, belt, jeans, denim

outfit1 (removed pants)
nami (one piece), long hair, orange hair, brown eyes, earrings, bare shoulders, shoulder tattoo, cleavage, striped bikini, green bikini, bracelet


outfit2
nami (one piece), long hair, orange hair, (hair ornament:1.1), brown eyes, (jewelry:1.1), earrings, bare shoulders, shoulder tattoo, cleavage, blue dress, sleeveless, bracelet, pelvic curtain, side slit


outfit3
nami (one piece), long hair, orange hair, low ponytail, hair bow, blue bow, brown eyes, collarbone, cleavage, short kimono, blue kimono, sleeveless, bare arms, bracelet, sash, obi


outfit4 (not perfect)
nami (one piece), short hair, orange hair, brown eyes, cleavage, striped shirt, white shirt, short sleeves, bracelet, miniskirt, yellow skirt

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