Takeru Shiba (志葉 丈瑠 Shiba Takeru?) is a young man descended from feudal lords, referred by his vassals and servants as Lord (殿 Tono?). He was raised since childhood by Hikoma Kusakabe to act the role of the 18th head of the Shiba House after his father gave him the Sisi Origami. His upbringing made him create a facade to look very arrogant and proud to others, claiming none can match his strength and greatness, while keeping his cool in any situation. Though he was reluctant to have the vassals fight by his side, as he wanted no one else to bear the burden, he allowed their involvement after giving them the choice to turn back or become Shinkengers out of want rather than need, as long as they are willing to finish their mission to the last detail. By the time Genta arrives, Takeru's facade is revealed as he now questions himself of how it makes him strong along with learning he shares similar attributes with Juzo before defeating him. While at times it may not appear so, Takeru does cares greatly for his vassals and when Genta arrives, he becomes more open with them. However, in a fight against Juzo, it is revealed that Takeru started to value his life more which, in Juzo's opinion, makes him weaker and makes Takeru doubt himself. In reality, Takeru has been acting as a kagemusha (影武者?, [Note 1]) for Kaoru, the true 18th head of the Shiba House who was unborn at the time of her father's death, having been chosen for his proficiency with Modikara and his swordsmanship. When Kaoru is injured while attempting to use the Sealing Character on Doukoku, she formally adopts Takeru, making him the 19th head of the Shiba House. After defeating Doukoku in the final battle, Takeru says goodbye to Kaoru and his vassals and stays in the Shiba House with Hikoma, resuming his days now as a true samurai, though it is implied that he remains in contact with his friends. As Hikoma insists that Takeru should start learning new things instead of just working as a samurai (such as playing the guitar or learning conversational English), he stands by the front door of the Shiba House, recalling his moments as Shinken Red.
As Shinken Red (シンケンレッド Shinken Reddo?), he is the Samurai of Fire (火の侍 Hi no Samurai?) and can use the Inromaru to become Super Shinken Red (スーパーシンケンレッド Sūpā Shinken Reddo?) or the Kyoryu Disk to become Hyper Shinken Red (ハイパーシンケンレッド Haipā Shinken Reddo?). In Tensou Sentai Goseiger vs. Shinkenger: Epic on Ginmaku, after being brainwashed by the Gedoushu, Shinken Red becomes Gedou Shinken Red (外道シンケンレッド Gedō Shinken Reddo?).