Lady triangle soldier

What was the deal with her? This part of the story really confused me in season 2

She called the number on the card she had (making it look like she was going to be a player) as the voice on the phone asked if she’s interested in playing

But then at the last scene in that episode, she’s in a guard uniform heading to the island

It just seemed so disjointed and poorly explained? Also she turned out to be a ruthless psycho with a gun