Amir had revealed his powers in the Martial Arts Tournament, and it was before Raze had teleported everyone away. Meaning there were those that were high up who were able to witness the power of the Hybrids.
However, this news was only slightly reported by the golden reports released by Bubble, and due to so much that happened, it was something that had been overlooked by many. The students knew Amir from before and were unaware of the fact that he was one of the Hybrids that day who were part of the attack.
Now the students were witnessing firsthand the large beast-like arm that was on their principal.
"He's a Hybrid, but aren't they really dangerous and just like beasts in human skin?" one of the students said, peeking around the side of the wall.
"Right, I heard they eat humans in their sleep to continue their power."
