Principal: United Nations (UN): is both principal and teacher, he'll immediately stop and peacekeep the countries that are fighting or stop them bullying (Or maybe not always) (and you can make your own what's his personality or description about the UN idc)

Teacher: (Any Alliance, Coalition, or Organization can be a subject teacher)

Countryball Students: Russia Belarus China Ukraine United Kingdom (UK) United States of America (US) Canada Germany Denmark and Greenland Japan Philippines Malaysia Indonesia Vietnam Mongolia South Korea North Korea Kazakhstan Papua New Guinea Australia New Zealand France Spain Thailand Myanmar India Estonia Lithuania Latvia Finland Sweden Norway Iceland Mexico Brazil Peru Argentina Uruguay Chile Venezuela Colombia Albania Pakistan Cambodia Laos United Arab Emirates (UAE) Palestine Israel Turkey Portugal Morocco Algeria Nigeria Niger Saudi Arabia Greece Georgia Taiwan Armenia Italy Brunei Ireland Madagascar Iran Cuba Chad Romania Sudan South Sudan South Africa Egypt Vatican City San Marino Yemen Angola Namibia Poland Netherlands Belgium Azerbaijan Uzbekistan Iraq Jordan Nepal Bolivia Switzerland (And Any other country you know)

The bullies: (Anyone can be a bully)

Diplomacy: Switzerland and All Countries: Neutral Pakistan and India: Enemy South Korea and North Korea: Enemies (I'm keeping them as siblings) (Too lazy to do more)