While it's hard to say definitively without seeing specific covers, the most prominent characters featured are usually:
* Elena Gilbert: The main protagonist, often depicted with a worried expression and a hint of danger.
* Stefan Salvatore: Elena's love interest, known for his brooding and conflicted nature. Often featured alongside Elena.
* Damon Salvatore: Stefan's brother, initially an antagonist but later develops a complex relationship with Elena. He might be depicted with a sinister look or with a hint of affection for Elena.
Other characters, like Bonnie Bennett, Caroline Forbes, and Matt Donovan, might appear on covers as well, but the focus is usually on Elena, Stefan, and Damon.
To get a more precise answer, please specify the covers you're interested in. I can then tell you who's featured based on their appearance or the book title.