The Cannon Fodder Awakens

Every novel has people who pass by the protagonists. Some are ordinary students who barely register in their class, spending every day watching the protagonists show off their love in all kinds of ways and witnessing their joys and heartbreaks, yet never even getting a name. Others are innocent cannon fodder in immortal romance novels, reduced to stepping stones on the male and female leads' path to love...

But what would happen if one day these marginal characters in novels developed a consciousness of their own?