quirk

Quirk is a term used to describe a peculiar trait, habit, or characteristic that distinguishes a person or thing. In everyday use, quirks are usually minor and harmless idiosyncrasies rather than disorders. A quirk can be a distinctive way of speaking, a ritual, a preference, or a physical peculiarity that stands out. While quirks can be endearing, they can also provoke humor or irritation depending on the context.

The word originates in Early Modern English, deriving from senses of twist or bend, and broadened to mean an unusual or distinctive trait. In modern usage, quirks can describe both people and objects, and the term is often pluralized when discussing multiple idiosyncrasies.

Quirks are common in character development in literature and media, helping to convey individuality. They are normally non-pathological and not subject to medical diagnosis, though the boundary between a harmless quirk and a compulsive habit can blur.

In popular culture, the term is used as a proper noun in the manga and anime My Hero Academia, where Quirk refers to the superhuman abilities possessed by characters. Each Quirk is typically unique to the individual and governs a specific power or trait, forming a central element of the show's world.