About the cirno-nee tag
cirno-nee is a character tag that NovelAI Diffusion can use. On Danbooru it has 206 posts, and its best-rated still image scores 72. 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 cirno-nee
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 cirno-nee in a prompt
Put the subject first, then this tag, then quality tags.
cirno-nee, solo, best quality, masterpiecewlop, cirno-nee, 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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An older version of Cirno on pixiv known as Cirno-nee [チル姉] usually depicted wearing a yellow or orange scarf and a more mature demeanor, and sometimes has red-blue heterochromia. This version of Cirno appears on good terms with Remilia Scarlet and the other residents of the mansion.
(taken from Cirno Wiki)
Ricia(リーチャ) popularized the use of Cirno-nee with his Video manga series on NicoNico Douga. http://www.pixiv.net/member.php?id=226209
As far as Ricia's Doujin goes, Cirno-nee is on really close terms with Remilia Scarlet as well as the rest of the Scarlet Mansion. Remilia and the Scarlet Mansion is also on friendly terms with the Makai residents such as Shinki and Yumeko. Sakuya deeply looks up to Cirno-nee as a sort of big sister character. While Sakuya-chan is still a child, everyone pretty much dotes on her causing her to be a little spoiled.
Other than wearing her traditional canon clothes along with just a yellow Scarf, Cirno-nee is also sometimes wearing a ⑨ hoodie and wearing her hair in an up pony-tail.
FAQ
Does NovelAI recognize cirno-nee?
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 cirno-nee.
How do I write cirno-nee in a prompt?
Write "cirno-nee" 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.