Kitton

When Kitton is first encountered, he is bundled in a parka and boots and carries a gun. Back inside his home, a mechanical structure resembling an igloo, he switches to a sweater.

Kitton has a bold and fearless streak. That courage showed itself plainly when he was ready to walk straight up to the unknown threat that was Franky and confront him head-on.

Out walking across a snowfield with his grandfather and Taroimo, Kitton came across Franky. The dog mistook the stranger for prey and attacked, but once the smoke settled Kitton was amazed to find Franky unharmed, and he happily joined in his "Super" pose. The boy went on to guide Franky to Vegapunk's old lab. He grew close to Franky, becoming one of the few people who knew the truth behind Baldimore's two legends, and he and his grandfather let Franky live and conduct research in the lab through the timeskip.

The anime broadened his part. There, Kitton and his grandfather haul a frozen Franky to a hospital, and after Franky recovers with an oddly gentlemanly new personality fueled by red tea, Kitton, missing the old Franky, leads him into a forest of dangerous cyborg animals to shock him back to normal. In the manga, by contrast, Kitton has no name and is depicted as a tall young man rather than a small boy. After Doflamingo's defeat, he was seen reading about the Straw Hats' new bounties alongside his grandfather, Taroimo, and several cyborg animals.