Source: Gonna be the Twin-Tail!! (Anime / Light Novel)

Character Description:
Tsube Aika is the childhood friend of the protagonist and a fierce warrior who transforms into Tail Blue to protect the world's "Twin-Tail" attribute. In her human form, she is a slender girl with long blue hair tied in—naturally—twin-tails. When transformed into Tail Blue, she gains a high-tech Twin Gear power suit. Her personality is classic tsundere: violent and easily agitated, especially regarding her flat chest, but deeply loyal. Her style alternates between her neat school uniform and her aggressive, water-attribute combat armor, which features sleek mechanical plates and her signature weapon, the "Masa-X" spear.

🗝️ Core Activation & Physical Traits

Use these base tags to define Aika/Tail Blue:

tsube aika, tail blue, 1girl, blue hair, very long hair, twin tails, blue eyes, flat chest, tsundere

👗 Outfit Tag Blocks (Easy Copy-Paste)

1. Tail Blue Twin Gear (Combat Armor)

tail blue, 1girl, blue mechanical armor, bodysuit, white gloves, blue footwear, hair ornaments, holding weapon, spear, masa-x, glowing, sci-fi armor

2. Yorigami High School Uniform (Casual)

tsube aika, 1girl, white shirt, short sleeves, blue sailor collar, red necktie, blue skirt, pleated skirt, white socks

⚙️ Recommended Settings

• LoRA Weight: 0.8 - 0.9
• Base Models: Optimized for Pony Diffusion V6 XL or Animagine XL V3.
• Vibe/Setting: For Tail Blue, use battlefield, explosion, blue flames, mid-air. For Aika, use classroom, school rooftop, sunset.
• Pro-Tip: To get her signature personality, use expressions like angry, blushing, shouting, or embarrassed. For combat scenes, use serious or determined.

📷 Sample Prompt (Tail Blue Engagement)

Prompt:score_9, score_8_up, score_7_up, 1girl, solo, tail blue, very long blue hair, twin tails, blue eyes, serious expression, blue mechanical armor, holding spear, masa-x, blue energy particles, sky background, cinematic lighting, sharp focus, masterpiece, anime style

Negative Prompt:score_6, score_5, score_4, lowres, bad anatomy, bad hands, text, error, missing fingers, extra digit, fewer digits, cropped, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, username, blurry, large breasts, (male:1.2)