Steampunk is a subgenre of science fiction that incorporates technology and aesthetic designs inspired by 19th-century industrial steam-powered machinery. Often set in an alternate history of the Victorian era or the American Wild West, Steampunk combines elements of fantasy, speculative fiction, and retro-futuristic inventions. It is characterized by a blend of historical and futuristic elements, creating a unique and imaginative world.

No trigger word needed, prompting for Steampunk or Steampunk Mechanical (with or without theatrical) style when adding is needed to get best results. Experiment...
Seems to work for mechanical characters, humans and animated character types.

For creating the image set (50) and the lora training, I used the workflows from @vrgamedevgirl
https://github.com/vrgamegirl19/comfyui-vrgamedevgirl