Takeru Shiba, the Samurai of Fire, is the Eighteenth head of the Shiba line and descendant of a line of feudal lords. He was raised since childhood by Hikoma Kusakabe to accomplish his family's legacy and this sort of upbringing made him seem arrogant and proud. He manages to keep his cool in any situation, much so that his vassals (protectors) consider him cold. Underneath this cold demeanor, he serves to protect humanity and proved this when protecting a little girl while fighting a monster in battle. He was given the other Shodo Phones by Hikoma to give to his four vassals. He hid his fear from his vassals in the beginning but slowly let go of the road blocks. In Episode 11, he ran away from home because of the burden he felt on his friends' lives. When an old childhood friend Genta arrived, the others discovered his secrets such as peeing himself as a child and he still sort of fears the place that caused that, a horror house at a fair. He initially did not want to accept Genta, part of the reason was that he was afraid he would reveal childhood secrets and he would loose his mystique over the others. Mako and the others convince him to accept Genta. He is not only a target because he is the head of the Shiba Clan but he is the one to seal Doukou, to find out the sealing character, Shitari has targeted him twice. One time getting him sick, demanding the seal in exchange for the antidote but is saved by Juuzo. He then questions himself of how it makes him strong along with learning he shares similar attributes with Juuzo, who targets him because he is a good fighter and wants to fight him. Everyone was against him fighting Juuzo, but he ultimately defeated him, but sustained wounds from it. He can use the Inromaru by itself to become Super Shinken Red or with the Kyoryumaru to become Hyper Shinken Red.