Pony tends to do the same kind of mouth, so I made one for some variety.

Pos: score_9, score_8_up, score_7_up, teefs44, teeth, diastema, solo, realistic, hair over one eye, blonde hair, 1girl, lips, teeth, parted lips, close-up, portrait

Neg: score_6, score_5, score_4, caucasian, european, bad teeth, simple background, ugly, pony, gaping, censored, furry, child, kid, chibi, 3d, bad anatomy, deformed, extra limbs, monochrome, elven ears, anime, food, extra legs, extra hands, mutated legs, mutated hands, (bad eyes, ugly face,) text, (watermark:1.2), (logo:1.2)

Guidance: 4 Steps: 28 Sampler: Euler A