Trained in Dark sushi , Meinamix, SD1.5v (depending on which one you pick)

https://civitai.com/models/24779/dark-sushi-mix-mix

https://civitai.com/models/7240?modelVersionId=119057

Lora weight: 0.45 ~ 0.80

Any good upscaler will do. Example:

Upscaler Highres: R-ESRGAN 4x+ Anime6B steps: 20
or
Upscaler Highres: 4x-Animesharp steps: 16

Denoising strength .3 ~ .5