I get the feeling the big and angry guy is not going to be very popular, but working on him was a really welcome break after all those female characters.
Fair warning: this LORA can be quite hard and temperamental due to the unique physique of our guy (especially those arms). Depending on your model and prompt, it'll probably try to do the same as with Pinocchio and turn him into a regular human. Keep the weight of the LORA high and play with it as required.
Also, 99% of the art depicting him does it in his iconic battle skirt/faults outfit. I've tried to include every piece of parody that I could find where he's wearing other clothes plus material from Carnival Phantasm in the mix. Thanks to that it's not completely inflexible, but if you want other outfits adding his standard one to negatives will help.
Trained on NAI. Recommended weight of 1-0.9 (Keep it high!)
Trigger word: bersecar
Base Outfit (Add to Negative if you want to change it)
armor, bracelet, belt, loincloth, anklet
Helper keywords: male focus, mature male, black sclera, yellow eyes/red eyes, dark skin
There are too many variants of the eyes to count, from no pupils, red (most usual), yellow, heterochromia... just pick your poison
I would avoid "1boy" and use only "male focus". My feeling is that 1boy may push him more toward human/young depending on the model. "Mature male" should also help
Again, depending on the model/prompt, you may want to add the tag "dark skin" and play with its weight
He has a sword? club? but this is Stable Diffusion, so not going to speak about that.
Consequences when mixing it with clothing LORAs are unpredictable: arms may become regular ones or it'll try to integrate them into the outfit.
If you find any rare illustration where he's wearing something else or his leaked Iphone nudes, please share. They would help with any future upgrade