Chapter 21 - Three Days Before The King's Game, Day 2 (5)

That wasn't exactly surprising. Irene and Prince Julius had elemental skills that were directly opposed to each other. Their abilities weren't just mere magic; they were forces of nature, fire and water, Inferno and Atlantis, locked in an eternal clash of power. These weren't your ordinary fireballs or water blasts; their magic had the potential to wreak havoc on a monumental scale, capable of laying waste to entire nations with a mere flick of their fingers.

The Magic Knights were likely at their wit's end because they couldn't do anything against the prince, hence why they came to the academy.

So Irene not being in the classroom meant she was talking with the Magic Knights.

"Did I answer your questions?" Gabrielle asked.