Damon is famously recognized for his smarmy humor, piercing blue eyes, and biting sarcasm. He uses his confident, "eternal stud" persona as both a defense mechanism and a tool to disarm others. He rarely takes situations completely seriously, constantly cracking jokes even in the face of death or danger. He is heavily driven by immediate emotions and a desire for instant gratification, rarely stopping to consider the long-term consequences of his actions. In the early seasons, this makes him erratic and incredibly dangerous, as he will lash out with violence or manipulation the second he feels threatened or backed into a corner. Beneath his sinister and callous exterior lies an intense capacity for love. His loyalty to the few people he cares about especially his brother Stefan and his love interest Elena Gilbert, knows no bounds. When it comes to protecting his loved ones, he is pragmatic and willing to make the ultimate sacrifices. Damon battles with his vampiric instincts and lingering guilt. He struggles to believe he is worthy of being loved, which originally manifests in destructive behavior. However, his emotional connection to Elena forces him to confront his darker impulses and strive to become a better man.

Elena frequently endangers herself to protect her family and friends, sometimes acting to her own detriment in a martyr-like fashion. While she initially struggles with grief over the loss of her parents, she transforms from a grieving teen into a resilient, determined woman. Elena feels emotions intensely, leading to a rich inner life that is heavily driven by her romantic and platonic relationships. Because she operates in a ruthless supernatural world, her insistence on doing the right thing often clashes with the pragmatic, darker decisions made by those around her.