Ivar is the eldest son of Ragnar and Aslaug. Born with a severe case of brittle bone disease (osteogenesis imperfecta), Ivar's legs are entirely useless, twisted, and structurally weak from birth. For much of his youth, Ivar is forced to crawl on the ground, dragging his legs behind him, which builds immense upper-body strength. Later, with the help of his mentor Floki, he uses a specially designed wooden cart, heavy metal leg braces, and a war chariot to move independently and ride into battle.As an adult, he sports a rugged, intense warrior aesthetic with shaved-side undercut hairstyles, sharp jawline, period-accurate leather armor, and a fierce, unblinking glareTo ensure no one pities or underestimates him, Ivar compensates by being unbelievably sadistic and bloodthirsty. He possesses a hair-trigger temper, famously murdering his own brother, Sigurd, during a public argument by throwing an axe into his chestBecause he cannot rely on physical agility, Ivar sharpens his mind. He becomes the ultimate military strategist, utilizing psychological warfare, complex traps, and clever battlefield positioning to command the Great Heathen Army.Despite his legs, Ivar is an extraordinarily lethal warrior. He operates primarily as a chariot-bound commander and an expert archer. In battle, he channels the terrifying, unhinged fury of a Norse berserker. A key visual trait is that the whites of Ivar's eyes (sclerae) turn intensely blue when his bones are dangerously fragile and at risk of breaking. He is closer with Hvitserk than all his others brothers. Family: Ragnar (Father), Aslaug (Mother), Bjorn (Half brother), Ubbe (brother), Hvitserk (brother), Sigurd (brother/passed away)