Dora watched as Silas' Patronus went to join the fray.The Dementors couldn't handle all of the positive energy and they started to scatter in earnest.

The disgustingly dreadful cold instantly started to lift and all of the happiness was shocked back into the world. But all of the energy that Dora had exerted casting the Patronus Charms had gotten to her. At some point during the battle Silas had taken Dora's hand again. Gently squeezing it she said, "Silas, you were brill..." and then everything went black and she started to fall to the earthen floor of the forrest.