
Robert Stephenson
ロバート・スチーブンスン
Edward and James Lloyd Steam's friend and rival, a major player in the Industrial Revolution. He claims that he wishes to use the Steam Ball for the good of the British Empire, but exactly how he plans to do it is questionable. Possibly based upon the real-life Robert Stephenson.
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Steamboy
Supporting

Vasconcellos, Jorge
Portuguese (BR)
Dumond, Philippe
French
Kodama, Kiyoshi
Japanese
Iovino, Sandro
Italian
von Hauff, Walter
German