This Kid’s Pretty Good

As for how to deal with Mimic Master. Tony Stark decided to detain her here for the time being. He had discovered that Mimic Master had undergone chemical modifications similar to those inflicted on the Winter Soldier. Under those modifications, control over Mimic Master's body was largely not in her own conscious hands. Put bluntly, Mimic Master was really just a robot wearing human flesh and bones. As for the true controller, it was likely General Drekov, lurking behind the scenes.