>>49847693
Roughly speaking, if it's for personal use you can go with anything, really. An anon did suggest WaiNSFW, but I personally use ZUKI Cute:
https://civitai.com/models/1437224

While the one I actually used was from the older model of ZUKI Cute (ZUKI Cute ILL 5.0), it's what I used for Princess Kushinida. I primarily use ZUKI Cute due to its 'cute' art style than any other model right now, really. Just for your own sanity later on if you're nit-picky enough and wanted to make the portrait 'fit in' to other portraits better, I'd add in something like '(black plain background:1.4)' to your positive prompt to insist the AI to try to make sure the background is a specific colour for easier magic wanding or similar later on.

Also while Illustrious primarily uses tags from Danbooru to generate images, you can combine them to a certain extent and still have it produce something you'd expect. For example, for your positive prompt you could enter '(1girl with green short hair)' and it'll still do that. Though you can still break it down to individual tags if you really want to be sure for more simpler images like that.