Erin went past the both of them, straight for a corner with a school bag stowed away. It was, as he tapped it with his wand, muttered something, and then hauled the thing open, clearly his bag left in the dry while he practiced. Water dripped from his hair down his face and the back of his neck, and he left muddy puddles where he walked, but those were secondary concerns. Erin drew out his broomstick cleaning kit and went and took a seat far away from the scowling Dax.
It wasn't until he'd taken out a cloth and some wax and bent over his water-streaked broom that he realized maybe it would be a better idea if he was dry as well, so as not to drip down on the thing and ruin all his hard work. So he laid his stuff aside and began applying his own dying and warming spells, running his wand along his sides and down the legs of his trousers. His hair still dripped water into his face, but that would dry by itself; in the meantime Erin concentrated on his clothing and not looking at Dax, whose expression was just begging to be smirked at. He did not take his clothing off to dry it - like hell was he doing that when Dion was unpeeling his shirt from an abdomen of steel. Erin was fit, yeah, but that was just unfair.
The mud coating his trainers and clinging to his cuffs steamed. For lack of anything better to do, Erin began to scourgify that off too. Sitting next to his broom, bent over to reach the bottoms of his filthy trousers, he could listen to the twins' conversation without either seeing the expression on his face.
He had a load of smart-arse comments ready to volley, but what was fun with Dax seemed incautious with Dion. Besides, for whatever strange reason Dion seemed to tolerate him, and that was an unexpected and potentially flimsy opinion Erin did not quite yet want to ruin.