Susanoo is not an individual character but rather a powerful technique used by certain members of the Uchiha clan in the Naruto series. Manifested as a giant, humanoid warrior, Susanoo serves as a formidable defense and offense in battle. Its appearance and abilities vary based on the user, such as Sasuke and Itachi Uchiha. Susanoo is a symbol of the ultimate Sharingan power, playing a crucial role in pivotal fights throughout the series.