This is an Illustrious style lora for the character Ultron from Marvel Comics. Specifically the look of Ultron from the video game Marvel Ultimate Alliance 3. Ultron never showed up in the second game and was only briefly mentioned.
A weight of 0.85 to 1.35 works well with this with most models with best results around or near 1. Sampling Steps of 15 to 35 works well with most models, as does a CFG Scale of 3.5 to 7.5.
Prompts for this lora are ( Ultron MUA3, muscular, robot, ).