This LoRA was trained on Park So-ae, one of the lead actresses in “Today's Han Yo-il is a Woman (Who's that girl?)”.
I recommend setting the strength to 1, but if there are any issues, lowering it to 0.8–0.9 will still produce a good Character.
Since the character’s outfit changes so frequently in the original comic, there is no standard costume.
However, if you describe the character's costume from the manhwa well in the prompt, it should be possible to achieve a reasonably similar result.