Who is Harley Quinn? - DC Secret Files & Origins

A promising psychologist and intern at Arkham Asylum in Gotham City, Harleen Quinzel was given the chance to get up close and personal with the Joker. Harleen became obsessed with her subject, helped him escape the asylum, and adopted a new identity: Harley Quinn, The Clown Princess of Crime. In time, Harley came to realize the Joker was holding her back, and she struck out on her own. Sowing her own brand of chaos across the DC Multiverse, she’s been a member of the Suicide Squad, the Gotham City Sirens, and more. After all, as Harley would say, if you're going to go a little crazy, you may as well sit back and enjoy the ride!

To learn more about Harley Quinn: https://www.dccomics.com/characters/harley-quinn