Aoda is a large blue serpent and one of the personal summons of Sasuke Uchiha in the anime and manga series 'Naruto.' Unlike other snakes from the Ryūchi Cave, Aoda is known for his polite and respectful demeanor, as well as his loyalty and willingness to follow orders without question. He played a significant role during the Fourth Great Ninja War, assisting Sasuke and his allies in battle. Aoda's calm nature and reliability make him a valuable companion in combat situations.