Dr. Fudo

Dr. Fudo is Yusei's father.

He was a lead developer in M.I.D.S who was killed in the Zero Reverse effect.

Rex Goodwin mentions him just before Yusei and the others are about to travel to Satellite aboard a helicopter. The reason being of this is because 17 years ago he and Rudger, who turned out to be Goodwin's older brother, were actually his assistants.

Later on Rudger foretells to Yusei and the others that the Professor wanted to cancel the Enerdy research, as he already suspected from the beginning that its rotation was quite unstable. Furthermore he got to the conclusion that there might be an accident (as it occurred never the less), however its cancellation instead ended up being completely rejected by the City.

And so instead the research ended up being handled to Rudger as the new leader developer. However as we all know, soon after that the catastrophic incident occurred which ultimately claimed Yusei's parents' lives.

Later on Mina reveals to the Signers, that Yusei's father entrusted "Red Dragon Archfiend", "Stardust Dragon" and "Black Rose Dragon" Duel monsters cards to Goodwin, so that their correspondent Signer could seal the safe switches which belong to the Enerdy system.