Kinniku, Mantarou

キン肉万太郎

The story's main character. He is the 59th prince of Planet Muscle (Planet Kinniku) and the son of the first Kinnikuman, Suguru Muscle, and Belinda/Bibinba. Raised during times of peace, he is a spoiled, cowardly, and lazy teenager, much like his father was at the start of the first series, though with more emphasis on cowardice and less on clumsiness. He usually starts matches in a cowardly state, only managing to land a few good moves due to luck. However, when his friends are in trouble or his opponent is being dishonorable, he manages to reach the state of Kajiba no Kuso Djikara (Burning Inner Strength). When this happens, the Niku-Mark appears on his forehead, and his strength, stamina, and technique increase manyfold. Because Suguru had his records annulled years ago, Mantaro never knew how great a hero his father really was until he met Alexandria Meat. Mantaro was named after Ultraman Taro (Ultraman + Taro/Kinniku + Mantaro). Mantaro's favorite wrestling move is his father's signature move, the Kinniku Buster (sometimes called the Butt Buster in the English dub, though it actually translates to Muscle Buster), which he used to win much of his wrestling matches with until he gained his own signature move, Muscle Millennium. Mantaro is rather lecherous and lusts after many girls, but his main love interest is Rinko Nikaido (Roxanne). His favorite food is galbi bowl (Beef and Rice), which he often sings about.
In the Japanese version of the anime, Mantaro has a habit of adding Muscle (Massuru) at the end of certain words and sentences in place of the standard masu. For example, Itadaki-masu (Itadakimasu), a common Japanese phrase said before eating, becomes Itadaki-MUSCLE (Itadaki Massuru).