This model is really straightforward, it generates a colored dot on a character's forehead. The trigger word is "COLOR dot on forehead". Explicitly trained on red, green, blue, purple, orange, yellow, black, and white but might support other colors. Note that you might not always get the target color for a variety of reasons.
That said, the point here isn't usually to make a colored dot but to form a "nucleation site" for some other brightly colored forehead feature to emerge around. The recommended usage is to keep it active for the first 15%-20% of steps and then turn it off. Automatic1111 has this built in with the syntax [black dot on forehead,::0.2] to keep it on for the first 20% of steps. If you have access to an extension to change the LoRA's weight, it's recommended to turn it off as well at the same time, so you can reduce the model's bias on your generation (though it will unavoidably cause some bias in the overall composition).
For best results, you should form both the dot and your intended goal object at the same time, so it's more likely to be vaguely shaped like the goal by the time.
This was inspired by issues I was having with my dragon character's blue forehead crystal being unable to "punch through" the overall bias not to have objects on a character's forehead, despite substantial attention paid to the area. This LoRA solves that issue handily.
I'm considering this first version experimental and I hope to see other people build better and/or similar LoRAs along this same vein. It can definitely be improved but it's good enough to release.