The HeadGirl is the girl who is incharge of
Head girl 1024x768

Headgirl poster for St Trinians 2

all of the activities that go on in St trinians school. The first known headgirl was JJ French. She now is the schools Guru who helped the Posh Totty's when they went onto School challange. The next headgirl was the infamous Kelly Jones who was the head girl when Annabelle Fritton arrived at the school, who conicidently becomes the next headgirl! Annabelle is the current headgirl. It is likely that  Annabelle is the headgirl in the third St Trinians.