About the jahy tag
jahy is a character tag that NovelAI Diffusion can use. On Danbooru it has 402 posts, and its best-rated still image scores 838. 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 jahy
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 jahy in a prompt
Put the subject first, then this tag, then quality tags.
jahy, solo, best quality, masterpiecewlop, jahy, soloThe 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
[quote]I am Jahy, the Dark Lord's right hand, and the second most powerful being in the Dark Realm![/quote]
The protagonist of Jahy-sama wa Kujikenai! (localised as "The Great Jahy Will Not Be Defeated!"), who alternates between an adult and child-like form due to circumstances.
Her hair is a blackish/dark blue colour in official illustrations, but in the anime it is a more saturated purple.
She usually wears a white t-shirt with "魔界復興" (Makai Fukkou - Dark Realm's Reconstruction) written on it.
Voiced by Oozora Naomi in the anime adaption.
FAQ
Does NovelAI recognize jahy?
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 jahy.
How do I write jahy in a prompt?
Write "jahy" 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.