"Katana is perhaps one of the most interesting characters in Suicide Squad. Rather than serving as a member of Task Force X, she'll instead be Rick Flag's bodyguard in order to watch his back against the threats posed by the villains he's attempting to lead into battle in the David Ayer helmed movie." (Reported Comicbookmovie.comFeatured above is an image of "Katana" from the movie Suice Squad, while below is actress Karen Fukuhara as seen in a Playboy shoot, where the above info is based from her interview.
WHO=IS: "Karen Fukuhara portrays Tatsu Yamashiro / Katana, an expert martial artist and swordswoman. She serves as Rick Flag's bodyguard and wields the mystical Soultaker blade, capable of trapping the souls of its victims. As she is a volunteer, not a criminal, she does not have a micro-bomb implant. Fukuhara stated that Katana "has morals and codes. She can also slice through hundreds of people without taking a breath."" (Wiki)