Ferocious Knight D (獰猛の戦騎D Dōmō no Senki Dī), also known as Deathryuger (デスリュウジャー Desuryūjā) is the main antagonist of the Zyuden Sentai Kyoryuger: Gaburincho of Music. He was the partner of Zyudenryu Tobaspino, only because he forced Tobaspino to forge a partnership with him.