In the lines you provided, the example of characterization can be found in the lines that describe Thisbe:
"If you searched all the East, you'd find no girl with greater charm than Thisbe."
This line characterizes Thisbe by emphasizing her beauty and allure, indicating that she is not only attractive but stands out significantly compared to others in the East. This contributes to our understanding of her character as someone special and desirable, which is a key element in establishing her relationship with Pyramus.