Chabatake Nana, tutor to the main character from the manga Katekin (カテキン). Created by Ojiro Makoto (オジロマコト). A series I used to read that never finished being translated. Probably not really well known, but someone else made another LoRA for a different character at least.

Add monochrome, greyscale for the manga look. Play around with tags like traditional media, sketch, manga coloring to have color images that are closer to the look of the manga.