undertale character prompts — 24 NovelAI character tags

About the undertale tag

undertale is a series tag that NovelAI Diffusion can use. On Danbooru it has 4,968 posts, and its best-rated still image scores 506. 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 undertale

V5

Follows composition and expression instructions closely, so the effect shows in a tidy form.

V4.5

Reacts to the tag more strongly, so its effect is easier to see.

ILLUST

WAI illustrious SDXL v17, a local model. Shows how the same tag reads outside NovelAI.

Writing undertale in a prompt

Put the subject first, then this tag, then quality tags.

Basicundertale, solo, best quality, masterpiece

With artistwlop, undertale, solo

The 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

Show the wiki text ▾

An American indie role-playing game developed by Toby Fox and released in 2015. Features unique art (courtesy of Temmie Chang) and music (composed by Toby Fox). The game exploded in popularity shortly after release and spawned many recurring memes.

The player controls a child named Frisk who has fallen into the Underground: a large, secluded region under the surface of the Earth, separated by a magical barrier. The player meets various monsters during the journey back to the surface, some of which may engage in combat. They can opt to appease monsters in order to spare them instead of killing them. These choices affect the game, with the dialogue, characters, and story changing based on outcomes.

Part of the UTDR series, along with Deltarune.

Characters

Major

** Photoshop Flowey

** Undyne the Undying

** Mettaton (Box) ** Mettaton EX ** Mettaton NEO ** Mettaton (Ghost)

** Asriel Dreemurr (God of Hyperdeath)

Minor Encounters

Minor NPCs

Others

Related tags

Alternate universes

Locations

Other

External links

Source: Danbooru wiki · undertale ↗

FAQ

Does NovelAI recognize undertale?

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 undertale.

How do I write undertale in a prompt?

Write "undertale" 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.

undertale

How to prompt undertale characters in NovelAI