Works with most anime models. Realistic models might not work, I don't use any.
If you like my LoRA, please consider giving me a rating!

Best weights: 0.6-0.9 - canvas size in portrait formats work well
Use 0.6 if you only care about the general shape of his hair. For results accurate to the characters, use 0.7-0.8. IF you want to be as accurate as possible, use 0.9.

For best results, include the following tags:
1boy, masculine, theo, blue eyes, short hair, black hair

For his original outfit, include:
black jacket, gloves, black pants, black footwear, gloves, rifle (Doesn't give best results)

Models used for preview images:

XXMix_2.5DV1: https://civarchive.com/models/54416/xxmix25d
VampeliumMixV2: https://civarchive.com/models/91829?modelVersionId=113096
MizuMixV5: https://civarchive.com/models/103270?modelVersionId=110783