Glenda

She is an employee of the Ankh-Morpork Post Office and works on the stamp counter, technically making her responsible to Stanley Howler, but in practical terms under the supervision of Miss Iodine Maccalariat.

She has the classically robust Ankh-Morpork sense of humour, which manifested itself in encouraging the feminised golem Gladys to give a soothing back-rub to Moist von Lipwig, just to see what happened next. Moist was just relieved that things got back to normal and he was no longer privileged with the ability to see his own eyeballs which is, of course, not given to the rest of us.