ikki
Tengen Toppa Gurren Lagann / Episode 3

Summary:Simon, Kamina, and Yoko encounter a beastman by the name of Viral while they are hunting. They get into a fight and learn that his Gunman has 2 faces, the normal Gunman head and another head on top.

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FullMetal Alchemist
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Hajime No Ippo
Katekyo Hitman Reborn
Code Geass