Aaron didn't like Viren's glance at all.
Though it was only for a second, he could feel the jealousy that filled it. There is no way to make acquaintances with a person like that, no matter what. If one tries to, then either they are stupid or naive, as a jealous person would never join your side, even if on the surface they act like that.
Moreover, Aaron learned that Viren was the shadow player who used Harry to attack him when he went to collect rewards for the first-year competition.
It was not an easy thing to achieve, as Viren was very careful in this matter. If not for the help from his senior sisters, Reyna and Zara, he wouldn't have succeeded in finding out the master planner.
When he found out about the fact that Viren was behind the incident, he immediately wanted to go and confront him, but his logical mind stopped him from doing so.