Tinuviel

Tinuviel was the lioness daemon of, or Starkiller, Darth Vader's secret apprentice. As the king (or actually the queen) of beasts, she showed people that he was strong, brave, and was willing to protect those he was loyal to.

Tinuviel was raised in the Dark Side of the Force like her human, and helped him kill Jedi survivors, anyone who got in the way, and their daemons. She also, however, grew a bond with Beren, the daemon of Juno Eclipse, Starkiller's pilot, and later, Ziethiel, Jedi Rahm Kota's daemon, when Starkiller was being redeemed by his love for Juno and the advice of Kota. In the first Death Star, she scared the wits out of the Emperor's spider daemon and badly wounded Vader's griffin daemon, helping Marek to sacrifice his and her life for the leaders of the fledgling Rebel Alliance.