This is a character from the old doujin work "Ashura Buster" by Ashura Mitsuru.
https://hitomi.la/cg/%E3%81%82%E3%81%97%E3%82%85%E3%82%89%E3%83%90%E3%82%B9%E3%82%BF%E3%83%BC-1-3-%E6%97%A5%E6%9C%AC%E8%AA%9E-494130.html
These doujin works appears to have been created by scanning hand-drawn illustrations. Increasing the LoRA weight restores the original art style. You may add "1980s \(style\), retro art style" as you like.
Recommend strength is around 0.5
ashura_b1, 1girl, brown eyes, brown hair, medium hair, blunt bangs, blunt ends, bob cut, sidelocks, school uniform, serafuku, sailor collar, short sleeves, red neckerchief, pleated skirt, miniskirt