Deathtanz Mantisk, the Vice Cheif Judge/Moonlight Judge of Grief Decapitation, one of the Eight Gentle Judges or Weil Numbers in Megaman 3.
Recommended Weights are: 1.0-1.5 (I found it to be more accurate towards 1.5)
Also I recommend to use 'IL Megaman Zero Style Character Design' LoRA by Chamber if you want to make his appearance to that of the game. (Half of the showcase images were made with that LoRA)
https://civitai.com/models/1055741/il-megaman-zero-style-character-design