Herrsimian is a tiny (121 samples), long-context (up to about 52k tokens) NSFW conversational dataset containing mainly data from a certain expert roleplayer (let's call him Simian) who used to actively participate on a few different forums until the end of 2022. It was used in Llama-3.1-Herrsimian-8B, although results weren't great there since the learning rate was probably too high and conversations alone don't make for a good RP model.
The roleplays are mostly in… See the full description on the dataset page:
https://huggingface.co/datasets/lemonilia/Herrsimian.