Create a caricature-style image of a ninja turtle with a human face

Create a caricature-style image of a ninja turtle with a human face, but this time the turtle should look weak and tired. The turtle's body should be thin with less-defined muscles, suggesting fatigue. The posture should be slouched, with drooping shoulders and an exhausted expression on the human face, partially covered by the classic vibrant-colored mask. The eyes should be half-closed or with dark circles, and the mouth can be open in a yawn or showing signs of tiredness. The background should be simple, perhaps suggesting an empty street or sewer, reinforcing the turtle's exhausted state, but keeping the focus on the character.