May fail with some characters, or when checkpoint is leaning too much into anime. In that case try to slightly increase weight of a lora (more than 1.3 often not good) and/or weight of keyword. Add jpeg artifacts into negative for better image. Experiment with realistic and photorealistic in positive and negative prompt (it may give better results, or do nothihg. Checkpoint leans into "sensitive" area and likes to depict women in nightgowns, if you don't specify attire. That doesn't affect well established characters, only generic "1girl". Have fun.
