Ragnarok, also known as the Demon Sword, is the weapon partner of Crona. Born a normal demon weapon, he was melted by Medusa in a vat of Black Blood while in his weapon form and mixed into Crona's blood. Ragnarok is rude, abrasive, loud-mouthed, and confident in his abilities. As a bully, Ragnarok is easily irritated, rude and violent, having no qualms about beating up his meister, giving Crona noogies, and depriving them of sleep purposefully. He has a habit of calling other people names, such as when he calls Maka a cow, a sow, and an idiot, and Dr. Stein a "screwhead". He also has a deceitful nature, not above taking advantage of Marie Mjolnir's kindness and lying to her and haggling with Maka for candy even in serious situations despite knowing it was unnecessary. Despite his bullying nature, he is intimidated from time to time when Crona manages to stand up to him, remarking to finding his meister scary. Ragnarok is also perverted, flipping Maka's skirt up with the intent of deriving some pleasure (only to criticize he did not) and pulling on Crona's skirt for no other known reason.