Who is Jillian? Do you recognise her? You don't . She's a creation of Stable Diffusion and is here for your use in your prompts.
I recommend you use ADetailer to show it at its best.
As many have realised, one thing that SD's models are bad at is creating normal looking or even less attractive people. This character is a little prettier than I hoped in most my common models, but in others, definitely leans plain.
Instead of my faceapp method, Jillian was trained using the generating from prompts methods described here, but with my own training set up. I used automated taggingh for once.