One of Yuya's friends; he isn't actually a You Show student due to being the heir to his family's dojo, but seems to hang around there a lot. He's an advocate of a method of Dueling he calls "Steadfast Dueling", which is taught by his family's dojo; basically the exact opposite of Action Dueling, it discourages unnecessary movement. Reflecting this, Gongenzaka's Superheavy Samurai deck has no Spell or Trap cards at all, and many of his monster effects can only be activated when he has no S/T in his Graveyard. They can also attack while in defense position, using their DEF points for damage calculation. Under the tutelage of Yaiba, he adds Synchro monsters to his deck. As a member of the Lancers, he adds the Superheavy General sub-archetype of Pendulum Monsters to his deck.