About the su-san tag
su-san is a character tag that NovelAI Diffusion can use. On Danbooru it has 1,457 posts, and its best-rated still image scores 210. 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 su-san
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 su-san in a prompt
Put the subject first, then this tag, then quality tags.
su-san, solo, best quality, masterpiecewlop, su-san, 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
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Fan nickname given to the doll that accompanies Medicine Melancholy from Touhou. Originates from what Medicine calls suzuran (lily of the valley) in PoFV. The doll doesn't actually have a name canonically.
Her official artwork from PoFV depicts her having short blonde hair with a red ribbon, blue eyes, pinkish-white wings, and an outfit with a red top and black skirt (the inverse of Medicine's outfit colors.) However, like with the other dolls in the series, her appearance often varies by artist.
Given Medicine is a tsukumogami, it's speculated that Su-san is actually the real Medicine and contains her soul, the larger main body being a projection, similar to the speculation of Tatara Kogasa's nature as a karakasa obake.
Appearance
See also
FAQ
Does NovelAI recognize su-san?
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 su-san.
How do I write su-san in a prompt?
Write "su-san" 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.