Enlisting an elite five-man team of the U.A.O.H's finest pilots, Miura builds a pyramid to generate Tetrahedron power to allow five U.A.O.H officers to transform into the Ohrangers and stop Baranoia's invasion.

(ユー・エー・オー・エイチ, Yū Ē Ō Eichi, United Airforce Overtech Hardware) and an immortal youthful ancient hero who battle the Machine Empire Baranoia.

They were originally normal humans until their body chemistry was slightly altered to utilize Chouriki (超力, Chōriki), a form of energy used by an ancient civilization dating back to the time when all the continents were Pangaea.

While separated from the others during the Bara Magma incident and losing her Power Brace, Momo is befriended by a German Shepherd named Johnny, referred to by the locals as a divine savior, who brought her to safety.

Riki (リキ) is a childlike-Legendary Chouriki hero of Pangaea who had been fighting against Machine Empire Baranoia, as King Ranger (キングレンジャー, Kingu Renjā) since ancient time, with an assignment to protect Dorin.

He was put into suspended animation at some point until he is released 600 years later in the present to aid his newfound teammates, the Ohrangers against the Empire, while continue to protect Dorin.

An anthropologist and scientist as well, he learned of the ancient Pangaean civilization in 1996 and reverse-engineered Chouriki to create the Ohrangers' arsenal and mecha when they are needed.

Ichiro, Satoko, Kiyomi, and Yutaka Nitta are Satoru Saito (斉藤 暁, Saitō Satoru), Reiko Mizuno (水野 令子, Mizuno Reiko), Saori Makishima (牧島 沙織, Makishima Saori), and Shunsuke Ōba (大場 俊輔, Ōba Shunsuke), respectively.

Kotaro Henna (辺名 小太郎, Hen'na Kotarō, 25, 29 & 30) is a crazed robot expert who unintentionally causes trouble while wanting to see what makes Baranoia tick.

Each individual Blocker Robo can wield giant-sized versions of the Battle Stick and King Blaster, and the Ohranger's main weapons.

When Bara Builder damaged Ohranger Robo, Goro found where Red Puncher was buried and managed to gain control.

Emperor Bacchushund (皇帝バッカスフンド, Kōtei Bakkasuhundo, 1-34, 39 & 40) is the ruler of Baranoia, built 600 million years ago by an ancient race.

In episode 33, it's later revealed Bacchushund had secretly been rebuilding some of his Machine Beasts and managed to harness the infinite energy from the Earth's magma.

Thanks to the Ohrangers' "Trojan Horse" plan with the Blocker Robos, this facility was destroyed preventing any more Super Machine Beasts from being created.

Empress Hysteria (皇妃ヒステリア, Kōhi Hisuteria, 1-41) is the wife of Bacchushund, usually remaining in the palace devising plans with her husband, though she does go down to Earth by herself at times.

Her body color changed from gold to silver when she gave all her power to her niece Multiwa, and as a result, she aged into Dowager Empress Hysteria (41, 47 & 48), now using what is left of her late husband's staff as a cane.

After his father's death, Buldont challenges Bomber the Great to a duel for the throne of Baranoia and loses with his body taken away by the exiled Hysteria.

He and Multiwa make themselves grow without Acha and Kocha's help but are eventually destroyed in the series finale at the hands of King Pyramidder Battle Formation.

While Bacchushund revives Buldont, Hysteria decides to do the same and sends all her 600 million years worth of energy to Multiwa who was sleeping on another planet waiting for the day to become the Machine Empress.

She eventually dies by her husband's side at the hands of King Pyramidder Battle Formation's Super Legend Beam, but not before she bears him a son.

After his birth, his parents are destroyed by King Pyramider and his grandmother Empress Hysteria sacrifices herself after the Ohrangers promise her not to harm the child.

Bomber the Great (ボンバー・ザ・グレート, Bonbā Za Gurēto, 35–41), known as the "Universal Bomb Bastard" (宇宙の爆弾野郎, Uchū no Bakudan Yarō), was just another one of Baranoia's Machine Beasts, yet was able to turn his entire body into a missile.

Kaiser Buldont returned to take back his birthright and Multiwa took control of Bomber by reprogramming him after they took out his arms, replacing them with a sword and a bunker.

In episode 8, Kocha was outfitted with the Giant System, enabling her to become a hammer for Acha to fling at a Machine Beast, transmitting an enlarging beam into it.

When Bacchushund learns of Riki's return, he frantically requests her aid by having her go after Dorin with Yuji, Juri, and Momo attempting to protect her.

She then uses Bara King to capture little girls in order to make them her new pets after splicing them with animal DNA, with Dorin as the crown jewel in her collection.

Enlarging into her true form, Keris traps Ohranger Robo in an electrified cage until King Pyramider frees it, with OhRed saving the girls before calling in Red Puncher.

They have sticks, that can extend into battle staffs or spears and give off an electric shock, as weapons and their heads can open so they can throw cutter discs or nets from their mouths and energy blasts from their eyes.

The Baracticas (バラクティカ, Barakutika) are battleships in the shape of gears, they can hold up to hundreds of Takonpas and are the means of transportation from Baranoia to Earth.

Built on the dark side of the Moon by Baranoia, the Machine Beasts (マシン獣, Mashin-jū) are the main weapons used for Earth's invasion.