Kiryuuin Satsuki is the main antagonist in the anime. She's the real person who rules over the academy. Satsuki has implemented the battle uniform hierarchy and every clubs are rulled by her subordinates. Her strongest warriors are known as the elit four. They deeply respect her and are ready to put their life on the line for her. Her charecter is rather cold and manages to keep calm in almost every stiuation. She doesn't like the weak and punishes everyone that lost with the removal of their uniform and position. Kiryuuin has a life fiber uniform just like Ryuuko. They are rivals and often get into conflicts.