That's the plan. Me, you and Violet (played by me). Read up on the story before you start
You'll have to attack the heroes once they leave the tower (after Violet has finished with them) or before they leave. It's up to you.
We don't get the necklace to the end of the game though. That's when I take it, and the heroes try to stop me.
You see, the necklace grants the weilder eternal life and infinite power! There's an image of it in my albums, along with my character and Violet.