Evidence

Daybreak team won, causing a celebration for the whole dorm. When Arthur went back to the fortress, he found Jonah standing beside Alice, holding the flag with triumph. 

"Alexie!" 

Jonah rushed in and gave him a bear hug. Arthur felt uncomfortable to be hugged with such affection but he let it slide. He felt a stabbing glare and turned to see Oliver mumbling with a pout. 

"This damn peasant, thinking he's so high and mighty. I can do better, I can…" 

"Oliver," Arthur walked over and patted him on the shoulder. "Instead of treating Jonah in this manner, how about you accept him as a friend?" 

"Brother, I can't do that." Oliver shook his head. "Commoners know no honor or prestige, they're untrustworthy." 

"Do you trust me?" Arthur was silent before asking. He didn't realize that this stereotype about commoners was that mainstream among the noble class.