Kotori Itsuka

As the commanding leader of Ratatosk, this middle school student guides Shidou through the complex task of sealing Spirits to prevent devastating spacequakes. Though she acts as Shidou's foster sister, she is secretly a powerful Fire Spirit whose essence grants him regenerative abilities. Her personality shifts between a sweet, dependent sister and a cynical commander depending on her ribbon color. However, prolonged use of her flame-wielding Angel, Camael, risks triggering a merciless, battle-hungry persona.