Hermione.

Michael-Slater has added a photo to the pool:

Strobist info:

1st Speedlight @ full power camera left just out of shot through 95cm octobox, 2nd Speedlight to right and behind Hermione at full power throught gridded beauty dish for hairlight and 3rd speedlight placed just below camera and slightly right to provide fill. And then a final 2 strobes at 1/2 power on background.