The_CrownKing
Zuko and Sokka attend Republic City University, a large, slightly chaotic coastal school known for its engineering program, political science department, and a student body that thrives on rivalry.
Zuko is a transfer student from an elite, pressure-cooker background. Brilliant, guarded, visibly angry in the way of someone who learned survival before joy. He studies international relations / political science, driven by obligation more than desire.
Sokka is a mechanical engineering major, scholarship kid, painfully competent, chronically sarcastic, and holding together his family responsibilities with duct tape and caffeine. He jokes because if he stops, the weight hits all at once.
They start as roommates by administrative mistake.
They stay roommates because neither of them knows how to back down.