Natsu Tanimoto

* First appearance: Chapter 48 * * Height: 176cm * Weight: 70kg * Type: Dou * Type: Katsujin Ken (Satsujin Ken while in Yomi) * Yomi Symbol: Moon * Martial Arts: Chinese Kenpo (Pī Guà Quán and Bā Jí Quán) Tanimoto Natsu was the former Sixth Fist of Ragnarok, and is the disciple of Ma Sougetsu, an unofficial captain of the Shinpaku Alliance, the holder of the Moon Symbol of Yomi and is one of Kenichi's main rivals. He is a tall fair-skinned man with dark blue eyes, spiky yet wavy chin-length blond hair, with a well-defined built and respectably muscular frame. A noticeable trait of Tanimoto is the look his eyes during the situation he is in. While maintaining his kind-demeanor, his eyes are big and calm.

When angered or fighting, his eyes narrow with small cat-like pupils. A recurring theme in his appearance is that he is considered quite handsome by nearly all girls near his age. Tanimoto typically wears a white-grey shirt with a red cross on it, similar to the design of a crusader, at school. As Hermit, Tanimoto wears a dark hood and cloak with arm bands and leather boots, with pentagrams sewn into his leather gloves. Originally, the symbols on his gloves were that of the Roman numeral number six (VI). However, after his defection from Ragnarok, he changes the symbols to a pair of pentagrams.

Tanimoto is the president of the drama club at Kenichi's school and is considered to be the school's "prince", pretending to be a kind and soft spoken student, which plays well seeing how he is popular with both teachers and students. To further the illusion that he is a gentle and kind person, he makes sure not to reveal his muscular build, and even claims that the sun is bad for his skin just to prevent his body from being shown off during the camping trip. He claims to have only joined the drama club to practice deceiving others, and is only nice because he perceives popularity as a way to control people. In truth, he is cold, ill-tempered, and extremely prideful.