First Encounter: Lena, the new girl in school, turns up in Ethan's English class though he soon realizes that he's been having dreams about her for weeks. A few days later, he almost hits her with his car. Naturally, sparks fly.
Defining Moment: Ethan has dinner with Lena's crazy family half of whom are good witches (or ''Casters''), half wicked witches. There's a fight, and Ethan ends up fainting...perhaps because Lena has just called him her boyfriend for the first time.
Relationship Challenges: When Lena turns 16, she may or may not become an evil sorceress, which is sort of a buzzkill. Also, Casters can't physically consummate relationships with mortals without killing them.
Why They Work: Initially, Lena and Ethan bond over their shared nature as outsiders; she doesn't belong in static Gatlin, S.C., and he yearns to leave the town for bigger and better things. Eventually, they learn that they're essentially the reincarnations of a pair of doomed lovers from the Civil War era which makes their pairing nothing short of destiny. Hillary Busis
Image Credit: John Bramley
Bella and Edward, Jace and Clary, and eight more made-for-each-other teen duos who made us swoon (WARNING: SPOILERS!)