| # 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 | |
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| ## Usage | |
| Use any or all of the following tags to summon Koharu: `koharu, 1girl, halo, pink eyes, pink hair, head wings, low wings, twintails, blue archive` | |
| - Hair and eye tags are optional but may help strenghten the effect. | |
| - The tag `ringed eyes` was used in images where her unique eye design was very prominent. | |
| - 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, black shirt, off shoulder, hat, beret, bra strap, 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) | |