Ryunosuke

Ryunosuke took the form of a big pink eastern dragon, though its sloppy origins left it looking off. Its head ran straight into its body like a worm, it sported a beaver-style tail and a snout closer to a pig's, and Kanjuro's companions first mistook the sketch for a worm, snake, or lizard. Scales covered it and a line of blunt spikes ran down its spine, but its stubby legs badly hampered the very climbing it was made for.

As with anything the Fude Fude no Mi animates, Ryunosuke obeyed its creator without question and pushed itself to finish carrying everyone up Zunesha despite the punishment its flimsy body took. Once the job was done, it showed a will of its own, beaming with happiness at the achievement and the Straw Hats' cheering. The crew, Robin especially, grew fond of the creature and gave it its name; Zoro and Law alone dismissed it as a bad drawing.

Kanjuro drew Ryunosuke on the Thousand Sunny's deck during the Zou Arc, and the Fude Fude no Mi immediately animated it. The dragon gripped Zunesha's leg while Kanjuro, Kin'emon, Law, and the Straw Hats climbed onto its back for the ascent. Partway up, the mink Bariete tumbled down and knocked Kanjuro and Kin'emon loose, but the group spared the exhausted dragon from going back for them. It kept climbing through clear distress until Zou came into view and the crew roared encouragement, naming it in that moment. Reaching the top, Ryunosuke smiled, then reverted to a flat drawing and went still, leaving the group in tears as Robin laid flowers at its resting spot. It was the only character in the series to share a name with its own voice actor, and its design echoed Momonosuke, who likewise becomes a pink eastern dragon.