Added a little reward system with her. If you play the game for long enough she will reward you with jewels or money. Right now, it's cool down period is long but will be shortened in next update. There will be one more boss in level 17 and a special variant of an enemy in level 14.
And Red Skeletons do have trio animation. You can find a couple of them in level 10 at bottom left side of the map.