Harleen Quinzell (aka Harley Quinn) as she appears in Smallville fan-fics.
Harley's personality is usually made her Arkhamverse self where she's obsessed with the Joker and subservient to him, though she's capable of leading his troops when push comes to shove.
Powers and AbilitiesEdit
Harley is fairly intelligent with a skill in hand-to-hand combat, though no where near as high as Batman's, and acrobatic skills on par with Batgirl.
Harley's main weakness is her obsession with the Joker, leading her to make rash decisions that end up leaving her at the mercy of Batman on numerous occasions.