Bernard Vs Sonia
Besides the fact Sonia and Bernard would be having a match, another reason why different classes had come to the weapon hall was to test their strength as well this was mostly for the lower ranks students who were still deciding who was going to be the team leader considering most of them were at the same rank, while this was going on in the weapon hall another was also happening in the training hall with most of the other classes testing themselves to know their teammates symbiote bloodline abilities.
The reason for this was quite simple, for a team to be truly called a team without any fault they needed to know themselves well enough by deciding their position and who was going to fit the role of attack mate, control mate, defense mate, and auxiliary mate in their team.