For a bounty

Recommended settings

Strength: 1.0

CFG: 3-7

Steps: 20-30

Sampler: dpm++ 2m sde

Scheduler: karras

Trained on/best with: Illustrious XL v0.1 or any Finetune or Merge (Wai, Hassaku, Nova,)

Positive:

asahit, 1girl, solo, virtual youtuber, 

Negative:

artist name, twitter tag, text