One of Grimoire Hearts' lower ranking members. Him, along with Yomazu, were one of the first of members of the guild to reach Tenrou Island.
Kawazu and Yomazu ambush Levy and attempt to end her life, yet Gajeel protects her from Yomazu's katana. After Yomazu explains about Grimoire heart to Gajeel and Levy, Yomazu attacks with a script attack that deafens Gajeel and Levy. Yomazu and Kawazu attacks Gajeel, but when Levy destroys Yomazu's silent script, Kawazu proceeds to attack Levy. During the battle, Levy escapes while Gajeel battles Kawazu and Yomazu. Kawazu is the first one to be defeated.