A computer system organizes text narratives and images about events using character tags, which are tags that are defined by users with respect to those persons that are depicted in the text narratives and images. Each character tag is associated with either a user profile or a pseudo-profile. A pseudo-profile for a person is created by a user when the user does not know if the person has a user profile in the computer system. An invitation e-mail that is sent to a prospective user may include content stored in the computer system, or a hyperlink to such content, that has been tagged with the character tag of the prospective user.