Jean Roque Raltique is one of the main protagonists of the anime series 'Fushigi no Umi no Nadia' (Nadia: The Secret of Blue Water). A brilliant and inventive young French boy, Jean is known for his curiosity, optimism, and talent for engineering. Throughout the series, he travels alongside Nadia and other companions, helping them with his scientific knowledge and inventions. His resourcefulness and unwavering support play a key role in overcoming the challenges faced by the group during their adventures.