Jaguar D. Saul is a giant and former Vice Admiral who deserted the Marines[2] and happened to wash ashore on Ohara.[1]

During the Buster Call that destroyed Ohara 22 years ago, he risked his life to protect a young Nico Robin and ended up frozen by fellow former Vice Admiral Kuzan.[8] While Robin and the World Government presumed that he had died, he had actually survived. After collecting the books that Ohara's scholars sacrificed themselves to save, he brought them to Elbaph and went into hiding,[5] after which he stayed and became a history teacher for the Walrus School, located on Elbaph's Sun World level.

He is a major ally of the Straw Hat Pirates during the Elbaph Arc.