clean lineart, detailed illustration, popopo_style, delicate xianxia anime illustration, sharp clean linework, cinematic cool lighting, masterpiece, best quality, 1girl, cold aloof xianxia senior apprentice sister, shadow assassin vibe, tall slender figure, sharp cold eyes, completely expressionless, pale skin, mysterious lethal temperament, jet black long hair, half-up half-down hairstyle, high tousled topknot adorned with silver floral hairpieces and dangling silver chains, intricate silver forehead chain with tiny pendant resting between brows, wispy face-framing strands, soft flowing loose hair, sleek dark assassin robe, full coverage, subtle dark cloud embroidery, silver thread trim, high standing collar, narrow streamlined sleeves, leather waist sash with hidden weapon pocket, black jade pendant, understated luxury details, combat-ready assassin stance, one hand holding a sharp silver dagger behind back, body slightly side-on, gaze staring forward, calm and cold bearing, misty dim shadow background, cool grey tone, quiet secretive atmosphere
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