Its second appearance differs from her first appearance.
According to its secret file, it is not afraid to take a big bite out of a mission (or Doof). Enjoys a steam after a long day of secret agent-ing. And it is still looking for a fedora large enough for her head. (Where's My Perry?)
However it did finally manage to find a fedora big enough for its head, since it is seen wearing one in "O.W.C.A. Files"