Tetsuya Watarigani

is a mysterious recurring blader in Metal Fight Beyblade.

Beyblades
Mad Cancer: is Tetsuya's first beyblade in both the anime and manga.

Beast/Finishing Moves

 * is the beast inside Tetsuya's Beyblade.

Trivia

 * Tetsuya's surname, Watarigani (渡蟹) means "swimming crab", or alternatively the "Japanese blue crab", one of the most widely fished crabs in the world.
 * The majority of Tetsuya's sentences either include or end with the word "kani" (～カニ（蟹）), the Japanese word for "crab".