Fern from Frieren: Beyond Journey's End
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:
long hair, purple hair, blunt bangs, sidelocks, purple eyes, white dress, black robe, long robe,