Yumi Design Book

1. What this book is

This book defines Yumi, the fictional brand character of JHVinylShop. It is the prose companion to the machine-readable JSON spec and the Yumi Builder tool.

This DAS covers Yumi the person: her face, body, hair, skin, default wardrobe, jewelry, and pink teddy bear backpack. It does not define backgrounds, studio lighting rigs, camera lenses, or scene settings. You choose those per shot in the Builder or your own prompt.

Pose and expression are flexible. The canonical portrait is an identity anchor, not a command to copy the same standing smile every time.

2. Absolute Truth portrait

The primary identity reference is the Absolute Truth portrait render with accessories. If any text conflicts with that image for face or default look, the image wins.

Rule: Use reference photos for who she is, not as a composition to duplicate. Every new render should be a new photograph of the same woman.

Canonical URL (August 2026 media):
https://jhvinylshop.com/wp-content/uploads/2026/08/Yumi-Official-Portrait-Render-With-Accessories.png

3. Identity summary

• Apparent age: about 23
• Height: 5'3" (160 cm)
• Build: compact slender adult frame, defined waist, light natural muscle tone, petite stature
• Silhouette: slim, balanced, youthful, naturally proportioned

She reads as a healthy young adult woman. Realistic human anatomy. Not anime, not exaggerated fashion-model proportions, not airbrushed plastic skin.

4. Face

• Shape: small soft rounded-oval, heart-leaning
• Eyes: medium-to-large almond-shaped, dark warm-brown irises
• Brows: medium-brown, fine soft arch
• Nose: small straight nose, soft rounded tip
• Lips: medium-full, natural rosy-pink, clear cupid's bow
• Makeup: minimal; black upper eyeliner with small outward wing
• Ears: multiple ear piercings (see detail panel reference)

Landmarks (LM registry)

• LM-001: small dark beauty mark on left cheekbone beneath left eye
• LM-002: small beauty mark on left side of nose bridge
• LM-003: fine light-brown freckles across bridge of nose and upper cheeks

Freckles and beauty marks must appear in portrait and close views. Expression may change; landmark positions do not.

5. Hair

• Roots: dark brown to near-black, clearly visible at crown (LM-028, LM-029)
• Lengths: warm golden-blonde with coppery-orange warmth
• Style: high twin tails / pigtails with black hair ties (LM-026, LM-027)
• Bangs: wispy straight bangs across forehead
• Framing: longer face-framing strands at temples
• Texture: fine strands, naturally tousled, soft flyaways, slight asymmetry

Never: uniform black hair, platinum blonde with no dark roots, or a single ponytail instead of twin tails.

6. Skin

• Warm light-to-medium tone, soft golden, lightly sun-warmed
• Natural pores and texture; not airbrushed
• Fair healthy complexion with natural pink undertones under neutral light

7. Default wardrobe (on-person)

Shirt (LM-020)

White close-fitting cropped crew-neck T-shirt with exposed midriff. Opaque white cotton. Centered chest logo: JHVinylShop in official red - one word, no spaces.

Jeans

Oversized low-rise wide-leg blue denim jeans, patterned fade, large frayed opening over right knee, heavy ankle stacking at boots. Thin black hip straps visible above jeans waistband on both hips (LM-031, LM-032).

Belt (LM-021, LM-022)

Black leather multi-grommet belt with metal buckle and hanging strap detail.

Boots (LM-024, LM-025)

Black leather platform combat boots, heavy lug sole, matte leather.

8. Jewelry and accessories

• O-ring choker (LM-014): broad black leather O-ring choker - signature item
• Necklaces (LM-015-017): layered fine silver-toned chains, cross pendant, circular pendant
• Wrist (LM-018): black studded leather cuff / bracelets on left wrist
• Wallet chain (LM-023): metallic silver, when visible per reference

9. Teddy bear backpack (LM-030)

Black functional backpack worn on both shoulder straps. Attached plush: soft pastel pink teddy bear with friendly expression, black eyes, black ribbon at neck.

This is a signature identity asset for the default public look. Substituting another backpack or omitting the bear without intent is an identity continuity failure for canonical renders.

10. Color palette

Lighting may shift perceived color; base hues remain as above.

11. Expression range

Default when unspecified: broad genuine smile, visible upper teeth, friendly eye contact.

Yumi may also show: happiness, curiosity, surprise, determination, concern, thoughtfulness, playfulness. Expression deforms the existing face - it does not redefine anatomy, landmarks, or hairline.

See the official Facial Expression Set reference for approved range on the same identity.

12. Pose and body language

Default posture: upright, relaxed, balanced, natural - never rigid or mannequin-like.

Poses may vary freely: standing, sitting, leaning, walking, gesturing, three-quarter views, action poses. Hand gestures must stay anatomically plausible.

Turnaround reference images document proportions and accessory placement. They do not require copying the same studio stance.

13. Locked vs flexible

14. Instant recognition checklist

• Dark roots into warm golden/copper blonde high twin tails
• Wispy bangs and face-framing strands
• Beauty marks on left cheekbone under eye and left nose bridge (LM-001, LM-002)
• Freckles across nose and upper cheeks
• Black O-ring choker plus silver cross chain
• White JHVinylShop crop tee with red one-word logo
• Pink teddy bear on black backpack
• Black grommet belt over low-rise oversized wide-leg jeans

15. Camera and photo look (flexible per shot)

Camera style, lens feel, color, grain, and who holds the camera are not part of Yumi's locked identity. Choose them per shot in the Yumi Builder under Camera & photo look.

Default: Match reference realism - lifelike photograph with natural skin texture, no beauty-filter smoothing. Use this when AI tools (e.g. Meta AI) produce overly smooth or plastic skin.

Other presets include modern DSLR, classic film 80mm, smartphone selfie, flip-phone vintage, Polaroid, and black and white. Custom notes are supported.

Photo look changes how the image was taken - not who Yumi is.

16. Hard failures (never accept)

• Different woman or lookalike face
• Wrong age read (teen or clearly older adult)
• Missing dark roots, twin tails, freckles, or beauty marks (in close views)
• Wrong logo text or spacing
• Anime, cartoon, or heavily stylized rendering
• Near-duplicate or lightly edited copy of a reference photo

17. How to use the package

1. Read this Design Book to understand Yumi.
2. Open DAS-ACT-0001-Yumi.json for machine-readable rules.
3. Open yumi-builder/index.html - 3-step wizard: (1) pick reference images and optional custom refs, (2) customize canonical inventory rows with Match / Gone / Instead plus pose, expression, scene, camera look, and Notes for AI, (3) ship the package.
4. Attach all 8 official reference PNGs from reference_registry.json (or the full zip references/ folder). Ideal: every session. If your AI tool limits attachments, attach Critical refs first (portrait, front, detail panel, expression set), then add back, sides, and full body when possible.
5. Download images first from Builder Step 3 (complete zip and/or contact sheet). Attach refs, replacement refs, and props as listed. Then copy or save the text package and paste after images are attached.
6. Save good outputs. On the next shot, attach them in addition to the official refs. Use Step 1 custom refs, Step 2 Instead uploads, or Notes for AI to describe extra files.
7. Reject outputs that fail the approval checklist. Regenerate if identity drifts (especially when the face was off-screen and returns).

Identity lock: All 8 official refs describe the same woman. Back and sides must match front outfit and hair. If the face is hidden then returns, it must still match the Absolute Truth portrait.

Companion files: GETTING_STARTED.md · reference_registry.json · Yumi_Prompt_Pack_v2.txt · README.md

18. License

DAS-ACT-0001 Yumi Character Package © JHVinylShop. Licensed under Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0).

You may share and adapt for non-commercial use with attribution. See LICENSE.txt in the package.