Leonardo is best known as the genius scientist of the Western Planet, earning the nickname "the one who observes the world" for his analytical approach. He's a major figure in the Renaissance movement, which has been instrumental in reviving knowledge from prehistoric civilizations—most notably the Ikusa Yoroi, or Battle Armor technology. He joins Jeanne Kaguya d'Arc as she travels to the Eastern Planet in search of the prophesied "Star Messiah," playing a crucial role in her expedition.
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