It's her, from that manga. She likes maids, beer and has a flat chest.
Part of my ongoing quest to generate accurate Kobayashi's, I still don't consider this perfect but it's good enough for a version 1, I may post updates in future.

This LORA is a bit wacky, need to use a weight above 1.0 most of the time, pray for good eye generation.
If you do not care about getting her "Sanpaku" eyes right, then use any weight, it'll work just fine.
Tags like "yellow tie, sanpaku, white shirt, collared shirt, pants, red eyes, red hair, ponytail, glasses, sidelocks, flat chest" will help you get her classic look.