Today "Mary Sue" carries a connotation of wish-fulfilment and is commonly associated with
self-insertion (the writing of oneself into a fictional story). True self-insertion is a literal and generally undisguised representation of the author; most characters described as "Mary Sues" are not, though they are often called "proxies"
[4] for the author. The negative connotation comes from this "wish-fulfilment" implication: the "Mary Sue" is judged a poorly developed character, too perfect and lacking in realism to be interesting. Such proxy characters, critics claim, exist only because authors wish to see themselves as the "special" character in question.