One of Grimoire Hearts' foot soldiers. He, along with Kawazu, were one of the first members of the guild to land on Tenrou Island.
Yomazu, who is created by Hiro Mashima, has no current information regarding any inspiration used to create him He first appears in Fairy Tail volume 25 and episode 101.
Yomazu and Kawazu ambush Levy. As Kawazu pulls Levy down to the ground and Yomazu prepares to slice her, Gajeel blocks Yomazu's attack. After Yomazu explains that the Grimoire Heart is going to hunt down Fairy Tail members, he attacks first with a script that deafens his enemies. He and Kawazu attack Gajeel until Levy destroys Yomazu's script with her script magic. Yomazu proceeds to attack Gajeel while Kawazu fights Levy. Yomazu uses his script magic to send a wind slash from his sword, and he lands a critical blow on Gajeel. As Levy flees from the battle at Gajeel's request, she leaves Gajeel some iron to eat. Before Yomazu can attack Levy, Gajeel stops him. Once Gajeel regains his second wind, Gajeel uses Roar of the Dragon on Yomazu while Kawazu bombards Gajeel with eggs. Gajeel knocks Yomazu away and defeats Kawazu; Yomazu rushes in and stabs Gajeel's hand. (There is anime and manga difference here) Gajeel breaks Yomazu's katana and defeats him with his Iron Sword.
After Yomazu is defeated, Erza interrogates Yomazu once she beats Yomazu's head. Yomazu explains that his guild is searching for Zeref and that the top members, Purgatory Kin, is arriving to Tenrou Island.
Like Levy, Yomazu uses script magic to unleash certain attacks. He can use his script magic to augment his katana's strength.