Callum
The dragons were magnificent, flying high in the sky and diving to do their jobs, fire hitting the Demontors, burning them until there was nothing left. The keepers didn't even have to do much work since the dragons seemed to sense the other magical creatures and instinct did the rest.
Callum kept checking the other keepers, making sure that none were getting hurt from the many Death Eaters that were on a broom, but all of the kids were holding their own, fighting hexes with fire, just like a keeper should do.
At the end of the day, Callum brought down his dragon back to the pen with nothing but a few scratches on him.