an author's (ability to provide a) description of a character or through her or his actions, words, personality and other typical features so that the reader, viewer etc can identify her or him clearly

marker, description; brand

to make a note of, put to one side, (money etc) for a particular use

signature characteristic

a device that represents something

crest

one of the named parts of the face

characteristic

a piece of paper or other material used for describing what something is

marker, description; brand

a piece of printed paper put on envelopes, parcels etc to show the postage paid

impression, symbol, seal