TZA the Mighty, or TZA to her friends (and enemies, and pretty much everyone else) has stalked the un-hallowed halls of PPC HQ at least since 2003. There are varying accounts about who she is and how she came to join the PPC, but something they all agree on is that if you think she's quiet and reserved, you don't know her very well and she's inordinately fond of mentioning how easy it is to castrate.
She alternates between the Phantom of the Opera Response Centre (Room 1881 in the fifth basement), the Labyrinth Response Centre (in the Castle Beyond the Goblin City), and righting the wrongs inflicted upon English and early Colonial American history into submission. Her weapons of choice include the Punjab Lasso, a scalpel with a #10 blade, a laser screwdriver (sonic is *so* last century), and her razor-sharp wits. Pets include Stinker and Stella the wolverines, Mac the Nuzgul, and Ook the Snowy Owl.
TZA has, after drinking way too many Pan Galactic Gargle Blasters, admitted to a sordid past as a fangirl and author of multiple Phantom of the Opera, Harry Potter, and Lord of the Rings badfics, leading to forced enrollment at both the Official Fanfiction University of Middle-earth and the Hogwarts Fanfiction Academy. Mysteriously, no records have been located to support her claims, though many former students have reported attending with her (oddly, all those who admitted to knowing her have since gone missing under most mysterious circumstances) and she is apparently a member of the Order of the Sphynx at the HFA and did postgrad work with Radagast the Brown at the OFUM.