I have chosen the main character of one of the books/short novels that has marked me the most (as well as many other people, since every person who reads it has his/her own interpretation): Gregorio Samsa from Franz Kafka's "The metamorphosis".
The oppression, the person against the system, the claustrophobia, the meaning of life...just one of the bets writers of the XX century.
Twitter did not take the whole image, so I post it here too