She watched from the tree.
The girl on the roof shivered slightly, then dropped to the ground.
Sword drawn, she walked across the ice towards Ender and the Hokage.
Silently, she walked up behind Ender.
The girl in the tree felt the urge to cry out. She did not. She wanted to save Ender, but she knew that she couldn't give away her position. She could not let Ender know that she was there.
She could only watch in horror as the girl from the roof pressed her sword into Ender's back...
And spilled his purple blood out onto the icy lake.