Show time
The plan was simple--Marissa would go to a public event just crowded enough that the Artist would probably feel safe showing up and where security would appear to be busier than norm.  She'd get "captured" by the Artist, but with the aid of the Birds of Prey, the Artist would be the one who found himself captured.  Marissa had on her person a tracker so that the Birds could keep track and she was armed with only shuriken as they were small enough to hide.  Everything else would be her own training.

She showed up exactly as planned, making the expected Marissa Wayne appearance which involved the press, a lot of smiling, and mingling with other famous children of the wealthy, most of whom Marissa privately thought were stupid.  She made the requisite rounds before moving off to powder her nose.  She hoped the Artist followed.