Any person or character who displays quixotism.
A famous 1605–1615 Spanish novel by Miguel de Cervantes (1547–1616), whose full title is El ingenioso hidalgo don Quijote de la Mancha (The Ingenious Gentleman Don Quixote of La Mancha).
The protagonist of this novel.
A sad or pathetic person given to flights of fancy; a daydreamer.
An imposter, especially one falsely claiming to have done military service.