EDIT/UPDATE: for v2.0, I'd highly recommend BlueBoys as a model! You'll need Adetailer or inpainting for the face. This version has more training images so the outfits should be more flexible!

Here's a prompt example: 1boy, male focus, solo, smile, closed eyes, military, red military cap, red headwear, upper body, gloves, white hair with red tips (plus the lora at a weight around 1).