alter ego

From Latin alter ego (literally “other me”).

名词 Noun

An individual's alternate personality or persona; another self.
A very close and intimate friend.
(law) A corporation used by a person to conduct personal business in an attempt to shield himself or herself from personal liability, and which a court may penetrate by "piercing the corporate veil" to impose liability on the person when they commit fraud or injustice.

派生词（2）