Bellatrix sticks her foot out, and an unknowing Peter trips straight over it.
"Pathetic little Pettigrew," sneers the Slytherin, gleefully. The Slytherin kicks Peter and he slumps forwards.
Sirius' laughter cuts off abruptly when he sees his friend at the mercy of his twisted cousin.
"Leave him alone, Bella," Sirius snarls, whipping out his wand. Bellatrix cackles.
"Going to take me on, Sirius?"
Remus decided to back Sirius up, for Peter's sake.
He saddles up beside a shocked Sirius.
"Loopy Lupin." Bella laughs. Remus is unmoved.
"Ready, Sirius?" says Remus, drawing his wand.
The first-years spring to action.