Main character prompt:

1girl, solo, pink hair, long hair, hair between eyes, blue eyes, yellow eyes, heterochromia, very long hair,

Recommended negative prompt to get original style:

realistic

Prompt for default version:

skirt, necktie, shirt, plaid skirt, halo, harness, white shirt, ahoge, long sleeves, blue necktie, plaid, wind, id card, collared shirt, chest harness, floating hair, hair between eyes, looking at viewer, pleated skirt, bangs, grey skirt,

Prompt for swimsuit version:

bikini, eyewear on head, frilled bikini, white bikini, sunglasses, twintails, halo, ahoge, frills, long hair, jacket, hair ornament, navel, low twintails, hair bobbles, blue jacket