Gundam was introduced as a martial artist who challenges Victory Ramenman to a duel but loses his left arm after attacking him with a sword when he loses. He dips his right arm in a bowl of poison for several days, transforming it into the secret Dokushu. He fights Ramenman again and nearly kills him with a touch from his Dokushu, but Ramenman recovers and fights him again, defeating him with the Daketsu Santen Kuzushi. When he falls over he accidentally touches himself with the Dokushu, killing himself. However, he somehow returns to life and becomes a strong ally of Ramenman's. In Volume 5 he regains his left arm with no explanation.
In the anime he has a sister named Uzura. To avoid sounding like Mobile Suit Gundam, his name was changed to Gadam (ガダム) in the anime.
Poison Hand (毒手, Dokushu)
Crimson Thousand Li Hawk (紅千里鷹, Kurenai Senri Taka)
Vile Poisonous Thousand Li Hawk (凶毒千里鷹, Kyōdoku Senri Taka)