The Ogre, Howls!! (鬼、吼える!! Oni, Hoeru!!) is the fifteenth episode of Hyakujuu Sentai Gaoranger. It is the start of the second arc of Gaoranger and introduces a new Duke Org to assist Ura, Duke Org Rouki.
The Gaoranger pursue the Duke Orgs as they try to present new Highness Org Ura with "beautiful things" even as he instead pursues something more important.
While the Gaoranger fought Vaccum Cleaner Org, Ura uncovered a sacred burial site to awaken an ancient warrior. Once the heroes defeated Vacuum Cleaner Org with the Hundred Beast Sword, Tsuetsue intervened. The giant monster was quickly killed by Gao King Sword & Shield. Tetom alerted the Gaorangers to Ura's doings. At their destination, the team encountered the contents of the unearthed tomb-Duke Org Rouki. The dark warrior defeated all of the Gaoranger before taking White's Gao Jewel for Gao Elephant. Once the orb was corrupted by Rouki's evil power, Gao Elephant solidified and disappeared from Animarium.
- Kakeru Shishi (獅子 走 Shishi Kakeru): Noboru Kaneko (金子 昇 Kaneko Noboru)
- Gaku Washio (鷲尾 岳 Washio Gaku): Kei Horie (堀江 慶 Horie Kei)
- Kai Samezu (鮫津 海 Samezu Kai): Takeru Shibaki (柴木 丈瑠 Shibaki Takeru)
- Sotaro Ushigome (牛込 草太郎 Ushigome Sōtarō): Kazuyoshi Sakai (酒井 一圭 Sakai Kazuyoshi)
- Sae Taiga (大河 冴 Taiga Sae): Mio Takeuchi (竹内 実生 Takeuchi Mio)
- Tetomu (テトム): Takemi (岳美)
- Highness Duke Org Ura (ハイネスデュークオルグ ウラ Hainesu Dūku Orugu Ura, Voice): Tamotsu Nishiwaki (西脇保 Nishiwaki Tamotsu)
- Duke Org Rouki (デュークオルグ 狼鬼 Dyūku Orugu Rōki, Voice): Eiji Takemoto (竹本英史 Takemoto Eiji)
- Duchess Org TsueTsue (デュークオルグ ツエツエ Dūku Orugu Tsuetsue): Rei Saito (斉藤 レイ Saitō Rei)
- Duke Org Yabaiba (デュークオルグ ヤバイバ Dūku Orugu Yabaiba, Voice): Kōichi Sakaguchi (坂口 候一 Sakaguchi Kōichi)
- This episode aired alongside Kamen Rider Agito episode 18, The New Boss
- Opening: Several changes in the opening occur as of this episode:
- The first shot in the Matrix is changed from Shuten, Yabaiba and Tsuetsue to Ura with the Duke Orgs.
- The second shot showing Shuten's eye opening is changed to Duke Org Rouki
- The montage of mecha adds in all the Power Animals and the GaoMuscle combination.