This is the cover of her story called Donum Deae
It's a kind of a HP / FFVII cross. ^.^
From left to right: George Weasley / Reno, Blaise Zabini / Tseng, Harry Potter / Sephiroth, Neville Longbottom / Angeal, Fred Weasley / Zack
And of course, you've got Lord Voldemort in the background.