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# Shimoe Koharu (Blue Archive)
下江コハル (ブルーアーカイブ) / 시모에 코하루 (블루 아카이브) / 下江小春 (碧蓝档案)
Note: this is an older LoRA that I recently retrained. I think the quality of the captions is lacking and as such this LoRA doesn't perform quite as well as it should. I'll re-tag the dataset when I have time.
[Download here.](chara-koharu-v3.safetensors)
## Table of Contents
- [Preview](#preview)
- [Usage](#usage)
- [Training](#training)
- [Revisions](#revisions)
## Preview
## Usage
Use any or all of the following tags to summon Koharu: `koharu, 1girl, halo, pink eyes, ringed eyes, head wings, low wings, pink hair, blue archive`
- Hair and eye tags are optional.
- The vertical line should appear automatically, but may not always reach past her chest because artists are inconsistent in how they draw it. You can try to describe it literally: `vertical black line running past navel` or whatever. Don't try `tattoo` unless you want womb tattoos.
For her normal Trinity outfit: `school uniform, off shoulder, hat, skirt`
It does a decent, but not perfect job with her eyes. Adding some combination of `embarrassed`, `open mouth`, `swirly eyes` with varying degrees of emphasis can draw out her characteristic horny retard look.
I tried to add the slit pupils expression and the model sorta gets it, but not very well. You can prompt it with `slit pupils` and `flustered` but it generally creates abominations.
Some of her swimsuits are in the training data, too.
## Training
*Exact parameters are provided in the accompanying JSON files.*
- Trained on a set of 183 images; 170 normal, 13 slit pupils/flustered.
- 4 repeats for normal
- 5 repeats for flustered expression outfit
- 3 batch size, 7 epochs
- `(170*4 + 13*5) / 3 * 7` = 1739 steps
- 0.078 loss
- 832x832 training resolution
- `constant_with_warmup` scheduler
- Initially tagged using scraped Danbooru tags, then heavily edited.
- Removed many shit/inaccurate tags
- Made sure important traits were present and consitently described, and traits like `halo` were consistent with actual visibility
- Pruned lots of redundant tags and simplified outfits. There is no `black serafuku, long sleeves`, only Koharu's `school uniform`.
- Added camera angles and image composition hints
- Added facial expressions (particularly `embarrassed`) and unusual pupils when present
- Used network_dimension 128 (same as usual) / network alpha 128 (default)
- Trained without VAE.
- [Training dataset available here.](https://mega.nz/folder/Wi4jRZbJ#OHhH-qsltCEbks3GF2gqmg)
## Revisions
- v3 (2023-02-11)
- Re-trained with more recent parameters. No changes to dataset.
- Still overfit to her standard outfit. Needs re-tagging.
- v2 (2023-01-15)
- Initial release.
- [Old version can be downloaded here.](https://mega.nz/folder/Wi4jRZbJ#OHhH-qsltCEbks3GF2gqmg)
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