Whoever is a pronoun that can be used to refer to any person, regardless of gender. It is an alternative to the pronouns 'HE' or 'SHE' and is often used to avoid gender bias in language. Whoever is also used to refer to any person in a general sense, such as when referring to a group of people. It is also used to refer to the person who is responsible for something, such as 'whoever did this will be punished.'