Seifer makes an appearance in Kingdom Hearts II, as a much younger version of himself. He is the leader of the Twilight Town Disciplinary Committee, together with Fuu (Fujin), Rai (Raijin), and Final Fantasy IX's Vivi. In DiZ's simulated Twilight Town, he is a rival of Roxas and his friends, and fights him in the dueling tournament known as the Struggle. In the real Twilight Town, he is still the rival of the friends, but since Roxas does not exist here, Hayner is his main rival. He is exceedingly antagonistic against Sora, the main character of the Kingdom Hearts series, but after he saves Seifer's gang from the Nobodies, Seifer gives him the Struggle Trophy, an unspoken sign of respect. Although his rival Squall appears in the series as well, the two never meet, though they retain their trademark scars.