abbuibuibui/TsubameKoyasu-Lora

Tsubame Koyasu (Kaguya-sama) — Illustrious SDXL Character LoRA

中文说明 | English (current)

An unofficial character LoRA for Tsubame Koyasu from Kaguya-sama: Love is War, trained on waiIllustriousSDXL v17 (waiIllustriousSDXL_v170). This repository publishes E1–E6 plus the unnumbered final weight. Comparative evaluation recommends E5 (tsubame_koyasu-000005.safetensors) as the default at strength 0.8.

Training images and captions: abbuibuibui/TsubameKoyasu-Dataset.

This is a fan-made derivative, not an official product. Rights to the character and source work remain with Aka Akasaka / Shueisha.

Files

Step checkpoints (*-step*) and optimizer state dirs are not published.

Label	File	Role
E1	tsubame_koyasu-000001.safetensors	Alternate.
E2	tsubame_koyasu-000002.safetensors	Alternate.
E3	tsubame_koyasu-000003.safetensors	Screened into matrix.
E4	tsubame_koyasu-000004.safetensors	Alternate.
E5	tsubame_koyasu-000005.safetensors	Recommended default @ 0.8.
E6	tsubame_koyasu-000006.safetensors	Close to E5; more outfit lock at 1.0.
Final	tsubame_koyasu.safetensors	Unnumbered final (evaluate vs E6 before treating as duplicate).

E5 SHA-256: F689769DA90F6D138C25C7F691F47C7F03B35FBA9698649E68F72486099C864D

Showcase

Direct E5 @ 0.8 outputs, no retouching. Euler a, 28 steps, CFG 4.5, CLIP skip 2, 832×1216; Hires / ADetailer off.

Portrait	Casual full body

Hoodie full body	Night street

Trigger Words and Settings

Captions used keep_tokens = 2, shuffle_caption = true. Dataset: 42 image/caption pairs. num_repeats = 4. Network dim 32 / alpha 16, AdamW 8-bit, UNet + both text encoders, bf16, SDPA, 1024 buckets. Training log does not print LR, so this card does not invent one.

Role	Token	Notes
Identity	tsubame_koyasu	Pink hair, pink eyes, short hair, black hair ribbon, earrings
Outfit	tsubame_casual	Main (22)
Outfit	tsubame_hoodie	Alternate (13)
Outfit	tsubame_school_uniform	5
Outfit	tsubame_tracksuit	2

Recommended: waiIllustriousSDXL v17 / Illustrious family; strength 0.8. Euler a, 28, CFG 4.5, CLIP skip 2, 832×1216.

Example:

<lora:tsubame_koyasu-000005:0.8>,
masterpiece, best quality, very aesthetic, absurdres, anime screencap,
1girl, solo, tsubame_koyasu, tsubame_casual,
pink hair, pink eyes, short hair, black hair ribbon, earrings,
portrait, looking at viewer

Negative (baseline + color-bleed guards):

lowres, bad, bad anatomy, bad hands, text, error, missing fingers, extra digit,
fewer digits, cropped, worst quality, low quality, low score, bad score,
average score, signature, watermark, username, blurry, extra person, two girls,
multiple girls, blonde hair, green hair, blue eyes, green eyes,
brown hair, black hair

Why E5

Round 1 screened E1–E6 (+ Final) at 0.8. Round 3 matrix used candidates E3 / E5 / E6 across 10 scenes × 0.4/0.6/0.8/1.0. E5 was the most balanced at 0.8; E6 is close but locks outfits harder at 1.0. See evaluation/横向测评记录.md.

Public Horizontal Evaluation

Sheets: columns = candidates (E3 / E5 / E6), rows = weight 0.4–1.0. Original outputs scaled with labels only — no retouching or swapped images.

Identity / angle

Front	Three-quarter

Full body / outfit

Casual full	Hoodie full

Scene / leak / trigger

Simple BG	Complex night

No outfit words	No trigger

Training

• Data: 42 curated stills + matching .txt. Published as abbuibuibui/TsubameKoyasu-Dataset.
• Single training run: tsubame_koyasu-000001 … 000006 plus unnumbered final.
• Network: LoRA rank 32 / alpha 16, UNet + both text encoders.
• Optimizer: AdamW 8-bit. LR not printed in logs.
• Precision: bf16, SDPA, 1024 buckets, batch 1, latents cached.

Related repositories

	Hugging Face	ModelScope
Model	TsubameKoyasu-Lora	TsubameKoyasu-Lora
Dataset	TsubameKoyasu-Dataset	TsubameKoyasu-Dataset

Compatibility and Limits

Scored on waiIllustriousSDXL v170. Character LoRA only. Prefer explicit outfit tokens for hoodie / school / tracksuit. High-school character.

License

• Character / source rights © Aka Akasaka / Shueisha / production committees.
• Weights under CreativeML OpenRAIL-M.
• Fan non-commercial use intended; follow the base model license for generations.
• Do not use for unlawful, deceptive, harassing, or exploitative purposes.