WordNet sense 1 (a person of a specified kind (usually with many eccentricities)):

case, eccentric, type, case

WordNet sense 2 (an imaginary person represented in a work of fiction (play or film or story)):

fictional character, fictitious character

WordNet sense 3 (a written symbol that is used to represent speech):

grapheme, graphic symbol

WordNet sense 4 (a formal recommendation by a former employer to a potential future employer describing the person's qualifications and dependability):

reference, character reference

WordNet sense 5 (an actor's portrayal of someone in a play):

part, persona, role, theatrical role

WordNet sense 6 (a characteristic property that defines the apparent individual nature of something):

lineament, quality

WordNet sense 7 (the inherent complex of attributes that determine a persons moral and ethical actions and reactions):

fiber, fibre