Use the Skin or Physique modifier to attach the biped skeleton to your 3D mesh.

Provides full manual control over every bone for custom movements.

Crucial for non-destructive editing, allowing animators to adjust specific movements (like a hand wave) without destroying the base walking cycle. Workflow Steps

Tools like Mixamo can be used to import pre-made animations onto a custom biped rig. 3. Robotics and Engineering Understanding Character Studio, Biped Complete Guide #9