Katie had been almost enjoying herself as they'd been throwing the bombs, even teasing Cass a bit - though not letting herself get too carried away. But as soon as the other fliers started coming into the air her entire demeanor changed.
It was no longer a game, and she focused completely on the spells flying up towards them from the ground as well as those from the death eaters who'd come up on brooms.
She was speeding towards another auror who was dueling in the air, when a flash of light came speeding in her direction. She spun to the side to avoid being hit and righted herself as quickly as she could turning to see who had thrown the spell at her.
Her face hardened when she saw a Death Eater with his wand pointed in her direction, her face hardened and she send a slashing hex towards him - even if it didn't hit him it could his his broom.