Draco smiled, not expecting that, and summoned first a set of green and black robes for him and then one for her. "Put that on over your clothes. It's got protection spells woven in, including ones tailored to my area spells that Protego won't save you from. And a collection of potions that might be useful. Also could you alert the Aurors with a Patronus?"

Meanwhile he was dressing with his own Malfoy battle robes over the top, and putting the potions he'd summoned into an extensible pocket. If she put them on she'd find they adjusted to fit her and were extremely well made.