This is Hatayama Aiko from the "Arifureta: From Commonplace to World's Strongest" series.
There are LoRAs for SD 1.5 and Pony, but I noticed there wasn’t one for Illustrious, so I decided to make one :)

I recommend setting the strength to 1, but if there are any issues, lowering it to 0.8–0.9 will still produce a good Aiko.

There’s a slight typo in the output name "Hitayama_Aiko_ilxl_v1", but it won’t affect usage, so you don’t need to worry about it!

positive prompt:

hatayama a1ko, green eyes, brown hair, short hair,

pink jacket, blazer, shirt, black skirt, black pantyhose,