Calliope's Family
Calliope must kill a vampire to please her family and fulfill her obligations (which she deeply wants), yet is unwilling to do so.
Vampires
Vampires are monsters who lurk at night, yet are capable of love, a human feature.
A Vampire's Bloodlust
All vampires have an unquenchable bloodlust, yet Juliette doesn't kill anyone and is satiated.
Vampire Hunters
Vampire hunters make a business out of hunting and killing vampires, yet Calliope, a member of a well-known and well-respected vampire family, refuses to kill a vampire because she loves her.
Juliette
On the surface, Juliette is a seemingly normal teenager who does typical teenager things. However, Juliette is the farthest thing from being a normal teenager.