Why Casi Wore the Uniform at the End

This is from two pages in issue #20
These panels cover her thought process as she goes over the fact her father destroyed Earth, and ends with her deciding to honour her fallen friends.

Panel One Panel Two Panel Three Panel Four Panel Five Panel Six Panel Seven Panel Eight Panel Nine Panel Ten Panel Eleven Panel Twelve Panel Thirteen Panel Fourteen Panel Fifteen Panel Sixteen Panel Seventeen Panel Eighteen Panel Nineteen Panel Twenty Panel Twenty-One Panel Twenty-Two Panel Twenty-Three Panel Twenty-Four Panel Twenty-Five