Zeus' Pet Eagle.
In the God of War series, specifically God of War II, Eagles play an important part as they are kept as pets of war. When Zeus was an infant, Rhea had an eagle carry him to safety of Gaia.
Zeus possessed the ability to transform into an eagle, one he used to drain a portion of Kratos' power and give it to the Colossus of Rhodes.
Finally, the eagle Ethon was used to torture the Titan Prometheus by feeding off his insides during the day, after which, his wounds would fully heal during the night. After Kratos freed him from his torment, the eagle is seen circling in the background.