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Be it snacks or evil, I'll eat it up!
Granute, secret lifeforms, kidnap humans for "Dark Market Snacks." Shoma, from another world, transforms with Gochizo, a sweet-eating monster, into Kamen Rider Gavv via a mouth-like belt to stop Granute's attacks and save people.
Hidekazu Chinen
Shoma Stomach / Kamen Rider Gavv
Yusuke Hino
Hanto Karakida / Kamen Rider Valen
Nozomi Miyabe
Sachika Amane
Kohei Shoji
Rakia Amarga / Kamen Rider Vram
Takashi Tsukamoto
Lango Stomach
Machi Chitose
Glotta Stomach
Ryo Takizawa
Nyelv Stomach
Ruito Koga
Jeebh Stomach / Jeebh Jardak
Honoka Kawasaki
Shita Stomach
Shintaro Asanuma
Kenzo Suga / Kamen Rider Bake
Yohei Tadano
Dente Stomach (voice)
Erena Kamata
Lizel Jardak
Hiroki Yasumoto
Bocca Jardak (voice)
Shuhei Handa
Masaru Inoue
Ayu Shoji
Gochizo / Agent (voice)
Kouki Sakurai
Gochizo / Agent (voice)
Hiroki Shimowada
Frappeis Gochizo (voice)
Kurumi Madoka
Puddinte Gochizo (voice)