Person
From KneeQuickie
Grammatical person is the relationship between a speaker and what he or she is speaking about. Most languages possess three persons, but some also possess what many consider a fourth person. The first three correspond to the speaker, the listener, and someone or something outside both. The forth, when present, usually refers to an obviative or out of focus third person that contrasts with the proximate third person.
Expression of person
The category of person shows up most frequently in pronouns and the vast majority of languages have all three persons represented pronominally. Many languages indicate the person of the subject on verbs as well, usually in conjunction with number. Some such languages take personal marking to greater extremes and thus become polysynthetic.
Exceptions
A few languages have lacked all three persons, most notably the ritual language Damin.
