abbuibuibui/HayasakaAi-Lora

Ai Hayasaka (Kaguya-sama) — Illustrious SDXL Character LoRA

中文说明 | English (current)

An unofficial character LoRA for Ai Hayasaka from Kaguya-sama: Love is War, trained on waiIllustriousSDXL v17 (commonly saved as waiIllustriousSDXL_v170). This repository includes complete E1–E7 weights. Comparative evaluation recommends E5 as the default, at strength 0.8. The training images and captions are in abbuibuibui/HayasakaAi-Dataset.

This is a fan-made derivative, not an official product. Rights to the character and source work remain with their respective owners.

Files

Download E5 for general use. The other six files are kept so other developers can compare epochs or pick a different trade-off. E3 is the most useful alternate when a lighter, less baked look matters.

E5 SHA-256: 7CFA62E199E61B49E7D05F7392296CBBA810339E8DF4CC9E310A84FB52158997

Showcase

These images are direct E5 @ 0.8 outputs with no retouching. Settings: Euler a, 28 steps, CFG 4.5, CLIP skip 2, 832×1216; Hires and ADetailer were off.

Trigger Words and Settings

This LoRA has an identity trigger and outfit tokens. Captions used keep_tokens = 2.

Recommended: waiIllustriousSDXL v17 or an Illustrious / NoobAI-family model; LoRA strength 0.8 (0.6 already identifies the character; school sweater and maid apron are more stable at 0.8; 1.0 often adds little beyond sharper faces and occasional sock swaps); Euler a, 28 steps, CFG 4.5, CLIP skip 2, 832×1216.

If ADetailer is enabled on the face, put ai_hayasaka plus blonde hair, blue eyes, and side ponytail in the face prompt, or the face can drift.

Example:

<lora:ai_hayasaka-000005:0.8>,
masterpiece, best quality, very aesthetic, absurdres, anime screencap,
1girl, solo, ai_hayasaka, hayasaka_school_uniform,
blonde hair, blue eyes, side ponytail,
white shirt, black skirt, sweater around waist,
upper body, looking at viewer, outdoors

Negative prompt:

lowres, bad anatomy, bad hands, text, error, missing fingers, extra digit,
fewer digits, cropped, worst quality, low quality, signature, watermark,
username, blurry, extra person, two girls, multiple girls

Why E5

E5 was not chosen because it was a later epoch. All seven checkpoints were first screened at strength 0.8 with the same recipe and fixed seeds on a front portrait and a school-uniform full-body shot (14 images). E1/E2 missed the waist sweater; E4 was middling. Only E3 / E5 / E7 advanced.

The second round generated one image per candidate in 10 fixed scenes at 4 strengths (0.4 / 0.6 / 0.8 / 1.0): 120 direct outputs. The comparison covered blonde hair, blue eyes, side ponytail; maid / school / casual control; profile and sitting; night-street identity; default-outfit leak without clothing words; and trigger isolation without ai_hayasaka.

The full Chinese evaluation write-up is in `evaluation/横向测评记录.md`.

Public Horizontal Evaluation

Each sheet below is a real comparison from one scenario: columns are epochs; rows are LoRA strengths. Images are original outputs scaled into labeled grids; nothing was retouched or replaced.

Round 1: E1–E7 @ 0.8

Round 2: E3 / E5 / E7 × 0.4 / 0.6 / 0.8 / 1.0

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Training

• —Data: 35 manually selected Hayasaka stills with matching .txt captions. Captions start with ai_hayasaka, <outfit>, keep_tokens = 2, remaining tags shuffled. Outfit counts: maid 13 / school 13 / casual 9. Published as abbuibuibui/HayasakaAi-Dataset.
• —Network: LoRA rank 32 / alpha 16, UNet plus both text encoders.
• —Optimizer: AdamW8bit; UNet LR 1e-4, text-encoder LR 5e-5; cosine schedule.
• —Precision and resolution: bf16, 1024 buckets, batch size 1, latents cached to disk, sdpa, no_half_vae. Flip and color augmentation off.
• —Steps: repeat 4 per image, 7 epochs, 980 optimizer steps (140 per epoch). One weight file saved per epoch.

Related repositories

• —Dataset: abbuibuibui/HayasakaAi-Dataset — the 35 image / caption pairs used for this LoRA.

Compatibility and Limits

This is a character LoRA, not a general style model. Evaluation used waiIllustriousSDXL v170, Euler a, and 832×1216. Without an outfit token, the school look often returns at mid-to-high strength. Write other clothes explicitly.

License

• —Character and source-work rights remain with © Aka Akasaka / Shueisha / the relevant production committees.
• —The LoRA weights are released under CreativeML OpenRAIL-M.
• —Intended for non-commercial fan use. Generated images must also follow the license of the base model in use.
• —Do not use this model for unlawful, deceptive, harassing, or exploitative purposes.