From MC's perspective:
Gallery room,
Suddenly, something attracts everyone's attention and the director and several managers are walking to the platform.
Their arrival brings the loudest cheers from the stands. The crowd realizes that the duel is about to start once their speech is over.
The director of the duel arena appears to be a middle aged man over forty. But his real age is triple that. Because of the high ranking wizard level. He was able to maintain a somewhat young appearance.
The rest of them are arena managers responsible for handling everything here.
"I welcome you all to the Wizard Heart Competition," The Director said in a low tone. But his soothing voice reaches everyone's ears.
The next second, the noise dies down. From A Block to C Block everyone starts listening to him carefully.
Seeing that reaction the director was pleased.
So he continued to speak.