The character of Holly was a recurring character for Season Four; she was part of the season storyline involving B613 and David Rosen.
History
Death
Holly was shot by Jake Ballard in front of David Rosen, after he found out that is was her that killed the three B613 Agents that David Rosen, Quinn Perkins, Huck and Charlie were trying to protect in the "safe house", on the commands of Rowan. ("Honor Thy Father")
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