An arch wizard who is descended from crimson demons; powerful humanoids who possess black hair and red eyes, and sport chuunibyou characteristics. Megumin only knows a single skill, the incredibly powerful explosion magic that immediately incapacitates her for the rest of the day when cast, and refuses to learn any other skills. (Source: Wikipedia, edited)

While wandering about as a spirit, Yukine was picked up by Yato and made into a Shinki. When called "Sekki" he transforms into a katana. In a katana form, he finds Yato's sweaty hands so disgusting that he calls him "Drippy." (Source: Fallen Syndicate)