Generate a high-quality 3D mesh of a fantasy creature torso designed for a modular character system. The torso should support bipedal anatomy with a defined central spine, subtle muscular structure, and clear, anatomically feasible joint regions for attaching limbs, a neck, and a tail. Include slight curvature in the spine to suggest flexibility, and maintain symmetrical, clean topology optimized for deformation and rigging. The design should balance fantasy aesthetics with realistic anatomy, without exaggeration.