Both Emily and Quasimodo are both victims of stereotyping. Emily is "a fallen monument, a tradition, a duty, and a hereditary obligation," perceived while because of his deformity and deafness, Quasimodo is considered a fool and is ridiculed.
Besides the fixed attitude toward the two characters, people also subject Emily and Quasimodo to ostracization. Thus, they both live lonely existences. So when they find someone to love, they rush to this person, directing all their deprived emotions toward this person. Of course, both Emily and Quasimoto live tragic lives as a result of their social deprivation.