Harley Quinn, real name Harleen Quinzel, was the sidekick and on-off girlfriend of the Joker. She occasionally struck out on her own, and often served as a companion and accomplice to Poison Ivy.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...
