Harley Quinn

The deranged Squad female is an unused member of the Suicide Squad, having been deemed too deranged to be trusted on a mission.

Biography
While John Diggle and Lyla Michaels were arguing outside of A.R.G.U.S. holding cells, the woman offered to help them through their problems, claiming she was a trained therapist. Amanda Waller hit her door to shut her up.

Behind the scenes

 * The woman appears to be a reference to Harley Quinn, a long-time enemy of Batman. Along with her slight appearance, she is voiced by Tara Strong, who uses a voice extremely similar to the one she uses for Harley Quinn in the Batman: Arkham games and Injustice: Gods Among Us.