Grand Prince of Moskva & Tsar of All Russia. Intelligent & devout, prone to paranoia, rage & episodic outbreaks of mental instability that worsened with age. Domestic abuser who beat up his daughter-in-law for dressing "lightly", causing her to miscarry. In a fit of anger, he murdered his eldest son & heir, Ivan Ivanovich after a quarrel in which the son spoke up for his wife. Hates the boyars for making his childhood miserable & betraying his trust. Created the Oprichnik secret police.