X-Man
The one, the only, the character they really didn't know how to write, so he just comes and goes from existence itself whenever it's convenient! To be fair, his closest comparable character, Rachel Summers, is kind of the same way.
Sometimes he's a hippie! Sometimes he's an angsty teen! Sometimes he's totally enlightened, or weirdly stupid, or has a motif that is entirely incongruous with anything that has ever been written for him!
How to Use this LoRA
But now, you can make pretty pictures with him in various costumes, or none at all! His powers should show very well if you use the tag eye glowing with power. You can get his hair and play with length by just using auburn hair with white stripe or some variation, you may need to adjust things depending on the model and how much it breaks just dealing with men's hair lengths somehow.
You can prompt for his X-shaped tattoo on his chest, but as this isn't a huge part of the character for me, I didn't make a point to train it in consistently.
He has a very good green look, a very good blue costume, and plenty of shirtless looks with different coats and jackets. He's easy to put in a variety of clothes, though you probably won't have much trouble prompting up one of his iconic looks. Action lines and power effects should be easy to add.
Different schedulers and samplers will make a difference, as will the model you're using. I've posted a gallery here with full prompts, so you can just work from those and probably get whatever you'd want.
As always, if you'd like to say thanks or support me, please feel free here, or I'm most always available for custom art commission work.