Season Overview:
For 18 generations, Samurai of the Shiba House (志葉家,Shiba Ke?) have suppressed the evil intentions of the Gedoushu, evil spirits that can enter the world of the living by squeezing through gaps between buildings and other structures anywhere in the city. Now, the youngest head of the Shiba Clan (Takeru Shiba) must gather his four chosen Samurai Warriors in order to battle the Gedoushu as the Shinkengers.
Shinkengers:
Takeru Shiba - ShinkenRed
((志葉 丈瑠/シンケンレッド ,Shiba Takeru/Shinken Reddo?))
Takeru is the 18th descendant of the Shiba family line. His arrogance at times can sometimes be hated by his father Hikoma Kusakabe. When approaching the chosen Shinkengers, Takeru's never say never attitude is implemented when he tells the chosen Shinkengers to "fight the Gedoushu or lose and die".
Spoiler
Soon after Yanasudare runs out of water and retreats, the Shinkengers admit defeat but Takeru thinks differently and so explains to them the story of the Hiden Discs (which were lost in numerous battles from the previous Shinkengers). Takeru stays again and trains a lot harder than before, causing him to lose some Mojikara. When fully grasping the power of the disc, Takeru returns to help out the Shinkengers for the second time and uses the disc on his Rekka Daizantou and turns it into the Oozutsu (Oozutsu = Bazooka) Mode which ultimately finishes off the Ayakashi's first life.
During the second life, ShinkenOh's Kantana has no effect on the Ayakashi and so Takeru calls forth the Kabuto Origami (see Origami Mechas) to assist the Shinkengers victory.
Ryunosuke Ikenami - ShinkenBlue
((池波 流ノ介/シンケンブルー ,Ikenami Ryūnosuke/Shinken Burū?))
Ryunosuke is a serious young man whose dream is to become a Kabuti dancer despite his parent's wishes to become a fully pledged Samurai. Through a loner, he tends to take Takeru's actions extremely seriously even when his comrades don't seem to be that willing to follow Takeru's guideance.
Chiaki Tani - ShinkenGreen
((谷 千明/シンケングリーン ,Tani Chiaki/Shinken Gurīn?))
Even through Chiaki is a cheerful and honest person, he has no interest in becoming a Shinkenger and often clashes with Takeru occasionally. While he is the weakest Warrior in the group, Chiaki had abandoned his training. His main surprise is that he is a great strategist.
Mako Shiraishi - ShinkenPink
((白石 茉子/シンケンピンク ,Shiraishi Mako/Shinken Pinku?))
Prior to becoming a Shinkenger, Mako was a Kindergarden Assistant to a local City School. She is a kind hearted girl who fights for our views. At times of need, Mako only helps out other people (including comrades) if they really need her support.
Kotoha Hanaori - ShinkenYellow
((花織 ことは/シンケンイエロー ,Hanaori Kotoha/Shinken Ierō?))
Kotoha is a pure hearted young girl who worked at a local bamboo shop near the outskirts of the city and is also skilled in Martial Arts. She took over from her older sister who became seriously ill prior to becoming a Shinkenger.
Gedoushu
The Gedoushu are spirits living in a giant Chinese sailing ship which sails along the Sanzu River. Able to squirm their way into the world of the living, they attack humans so that the river overflows and flood the mortal realm. Though defeated and sealed by samurai eighteen generations ago, the Gedoushu are now reawaken in present time to resume their havoc.
Doukoku
The Blood Feast Doukoku is the leader of the Gedoushu clan. He is armed with a huge broadsword and is always in a constant state of rage. The only way to calm his rage is to drink sake in which a Nanashi always provide him with some.
Dayu
Thin-Skinned Dayu is the right hand of Doukoku. She is the only one out of the clan who is calm and always plays the shamisen to add intense atsmosphere to the rocking boat. She loves to collect beautiful things that would mean absolutely nothing to the clan.
Shitari
Shitari is the strategist of the group.He sees humans as mere pawns in the Gedoushu's attempts to allow the Sanzu River to overflow into the human world.
Juuzou
Juuzou is the fourth Gedoushu. He is seen in the opening sequence alongside the original three Gedoushu but makes his full debut in Act 8.
Spoiler
Nanashis
The Nanashis are the footsoldiers to the Gedoushus and their task is to get their hands dirty alongside a Ayakashi. During the second life, they are known as the Oonanashi Renchu's. Their weapons vary from bow and arrows to traditional Samurai swords, the Oonanashi Renchus occasionally make an appearance but it's mainly the Ayakashis who attempt to destroy the Shinkengers and their Origami Mechas.
Ayakashis:
The Ayakashis are anicent evil monster spirits that serve the Gedoushu. It is thier job to ensure that they attack the city by providing nightmare (ish) destruction on the humans while at the same time allowing the Sanzu River to overflow into the human dimension. Each Ayakashi has two lives. The second life allows them to grow into a giant once they are slained by the Shinkengers in their human lifeform. Each Ayakashi has individual weaknesses to the way that they must be destroyed.