Which lines from Ovid’s "Pyramus and Thisbe" contain an example of characterization?

ringed by the tall brick walls Semíramis
had built—so we are told.
If you searched all
the East, you'd find no girl with greater charm
than Thisbe;
The wall their houses shared had one thin crack,
which formed when they were built and then was left;
when firstlight
had banished night's bright star-fires from the sky
and sun had left the brine-soaked meadows dry,