Experiment In Terra

My all-time favorite Teen Titan was never truly a Titan at all. Tara "Terra" Markov was an infiltrator, working all along with Slade Wilson, aka Deathstroke the Terminator, to capture the Titans for the nefarious organization called H.I.V.E.

Tara, half-sister of Geo-Force of the Outsiders, was created -- by Marv Wolfman and George Perez -- with the intent that she was irredeemable. A complete sociopath from Day One, she gained the Titans' trust -- and Gar "Changeling" Logan's heart -- all to help Wilson destroy them, and fulfill his late son's contract for H.I.V.E.

I'm not usually one for the "bad girls," but I was a total mark for Terra from the very beginning. And when she met her ultimate fate at the conclusion of the classic "Judas Contract" storyline, I'll admit, I was a little heartbroken. Though not nearly to the extent Changeling was, of course.