Towa from That Time I Got Reincarnated as a Slime / Tensei shitara Slime Datta Ken
Keep in mind that settings may vary slightly between different versions. See below for more details.
When I tested this with different checkpoints and LoRAs, it seemed to work quite well.
Pony:
A LoRA weight of 0.8 works great, though you can adjust the strength as you prefer.
Prompts I usually used:
short hair, brown hair, green tips, colored tips, multicolored hair, hair tubes, red circlet, purple eyes, gold armlets, gold choker, white dress, gold belt buckle, orange waist cape,
SD 1.5:
A LoRA weight of 0.7 works great, though you can adjust the strength as you prefer.
Prompts I usually used:
brown hair, green tips, purple eyes, long dress, white dress, orange (waist:1.3) cape, gold armlets, gold necklace, gold belt buckle, red headband