Disguise in the context of "Wig"

A mask is an object normally worn on the face, typically for protection, disguise, performance, or entertainment, and often employed for rituals and rites. Masks have been used since antiquity for both ceremonial and practical purposes, as well as in the performing arts and for entertainment. They are usually worn on the face, although they may also be positioned for effect elsewhere on the wearer's body.

In art history, especially sculpture, "mask" is the term for a face without a body that is not modelled in the round (which would make it a "head"), but for example appears in low relief.

An impostor (also spelled imposter) is a person who pretends to be somebody else, often through means of disguise, deceiving others by knowingly falsifying one or more aspects of their identity. This is in contrast to someone that honestly believes their false identity due to psychosis (break from reality), mistake (e.g. mistakenly switched at birth, or memory problems), or having been lied to about their identity by another (e.g. by a parent, or kidnapper).

They may lie about their name, rank or title, profession, education, identity of family members or friends, social class, notoriety or influence, life experiences, abilities or achievements, their health history or disability (or that of their family members), citizenship or club membership, racial or ethnic background, religious or political affiliation, wealth or property ownership, tenancy or residency, past or current employment, charitable contributions, criminal or civil court history.

A secret identity is a person's cryptonym, incognito, cover and/or alter ego which is not known to the general populace, most often used in fiction. Brought into popular culture by the Scarlet Pimpernel in 1903, the concept was widespread in pulp heroes and is particularly prevalent in the American comic book genre, and is a trope of the masquerade.

In American comic books, a character typically has dual identities, one overt and one covert. The false or public identity being known to the general public as the "superhero persona" and the other being the secret identity. The private or secret identity is typically the superhero's legal name, true identity, and/or "civilian persona" when they are not actively assuming the superhero persona. It is kept hidden from their enemies and the general public to protect themselves from legal ramifications, pressure, or public scrutiny, as well as to protect their friends and loved ones from harm secondary to their actions as superheroes.