A LoRA trained via NAI on 'hair rings'. Don't know what hair rings are? Yes you do, you saw the images when you clicked on this LoRA.
The basic trigger word is, unsurprisingly, 'hair rings'. While the model hasn't been trained on anything more specific than that, you can somewhat control the position, size, and style by prompting different adjectives alongside it; see the example images for some ideas. It's still very much a gacha, but it's workable.