About the hair in own mouth tag
hair in own mouth is a hair tag that NovelAI Diffusion can use. On Danbooru it has 2,138 posts, and its best-rated still image scores 1,102. The samples above put the tag at the front of a fixed base prompt with seed 1234, so the differences between tags come from the tag alone.
How each model draws hair in own mouth
Follows composition and expression instructions closely, so the effect shows in a tidy form.
Reacts to the tag more strongly, so its effect is easier to see.
WAI illustrious SDXL v17, a local model. Shows how the same tag reads outside NovelAI.
Writing hair in own mouth in a prompt
Put the subject first, then this tag, then quality tags.
1girl, solo, hair in own mouth, best quality, masterpiecewlop, 1girl, hair in own mouthThe negative prompt and the full settings are on the terms page.
How these samples were made
Every image uses 832×1216, seed 1234, 23 steps and the k_euler_ancestral sampler. The base prompt and negative prompt stay the same for every tag, and only the tag under test changes. Images flagged by the NSFW check are regenerated with a new seed or hidden.
From the Danbooru wiki
When a character is holding a lock or single strand of their own hair in their own mouth. Often used as a visual shorthand for derangement, e.g., on yandere characters, but also sometimes just used as a sign of general dishevelment.
See eating hair for when someone is chewing on someone else's hair. See stray pubic hair for when someone has pubic hair in their mouth.
Examples
See also
FAQ
Does NovelAI recognize hair in own mouth?
Compare the samples on this page. Every tag on this site shares the same seed and base prompt, so any change you see comes from hair in own mouth.
How do I write hair in own mouth in a prompt?
Write "hair in own mouth" near the front of the prompt and separate it from other tags with commas.
Should I use V5 or V4.5?
V4.5 shows the tag's effect more strongly. V5 gives steadier images with fewer artifacts.