Using the Heaven's Tower (天の塔, Ten no Tō) as a bridge between the dimensions, the Gosei Angels made it their mission to protect Earth.
[21][22] Additionally, her Gosei Weapon is the Landick Claw (ランディッククロー, Randikku Kurō), which allows her to perform the Yellow Shock (イエローショック, Ierō Shokku) attack.
Additionally, his Gosei Weapon is the Seaick Bowgun (シーイックボウガン, Shīikku Bōgan), which allows him to perform the Blue Check (ブルーチェック, Burū Chekku) attack.
[27] Ten thousand years ago, he was originally the Groundion Headder (グランディオンヘッダー, Gurandion Heddā) and battled the Yuumajuu alongside Brajira until they got separated.
[27] Gosei Knight's motivations initially put him at odds with the current Goseigers, as he does not care for Earth's inhabitants who pollute the planet.
When the Matrintis Empire attacks, Gosei Knight's life force starts to dwindle, leaving him unsure of whether he should continue fighting alongside the Goseigers.
After Nozomu helps him realize humans have the potential to redeem themselves and protect the planet, Gosei Knight renews his resolve to support the Goseigers in their battles.
After their first encounter, Alata leaves to rejoin his teammates, but forgets his Change Card, which Nozomu returns later during the Goseigers' first fight with Warstar's forces.
His most powerful technique is the Gravity Fall (引力落とし, Inryoku Otoshi) ceremony, wherein he uses stored dark matter in his body to cause a nearby natural satellite to impact the planet he is currently on.
[43] Dereputa personally destroys Heaven's Tower to facilitate Warstar's invasion, but is severely injured in battle with Alata and develops a vendetta against him.
[45] In the present, Dereputa unknowingly exposes the Erurei Box, allowing Brajira to secretly break the seal and rejoin them in his Buredoran guise.
However, he intended for his apparent demise in order to absorb the full brunt of Super Gosei Power before his remains are transferred into the Erurei Box to regenerate and create the Yuuma Hole (幽魔ホール, Yūma Hōru) to destroy the Earth.
[32][45] Kinggon of the Bigfoot (ビッグフットの筋グゴン, Biggufutto no Kingugon) is the tarantula-themed military leader of the Yuumajuu and one of their strongest warriors who tends to say certain words in a sentence three times.
However, Kinggon sees through the deception, goes into hiding to locate the Bibi Bugs' hive, and eventually resurfaces to kill Brajira before attempting to assist Makuin in their plan to absorb the Earth.
[32][45] The minor Yuumajuu (幽魔獣（ユーマじゅう）, Yūmajū) are monsters who avoided Makuin and Kinggon's fates by hiding within different parts of the Earth before resurfacing once their leaders are released.
The Machine Onslaught Empire Matrintis (機械禦鏖帝国マトリンティス, Kikai Gyo'ō Teikoku Matorintisu) is the remnants of an ancient empire that had sunk 4500 years ago, from which its cybernetically modified sole survivor and his marine invertebrate-themed robotic creations established a new base, the Machine Fortress Terminel (機械要塞ターミネル, Kikai Yōsai Tāmineru), and plotted against humanity before resurfacing in the present to enslave them.
Robogorg of the 10-sai (10（テン）サイのロボゴーグ, Tensai no Robogōgu)[c] is the shrimp-themed leader of the Matrintis Empire who was originally a human scientist who perfected a method of immortality through cybernetics and uploading his mind into a Matroid body.
Using his creations to gather intel on the Goseigers, Robogorg eventually moves in to finish them off by using Brajira to seal their Tensouders and Leon Cellular.
However, Brajira secretly ensured the latter device remained functional, allowing Gosei Knight to foil Robogorg's plot to kill the Goseigers.
Robogorg's title comes from his 10 built-in abilities: the Genius Brain (鬼才ブレイン, Kisai Burein), which allows him to create and improve Matroid designs, the Punishment Bomb (制裁ボム, Seisai Bomu) to discipline his subordinates, the Fortress Armor (要塞アーマー, Yōsai Āmā), the Devastation Vulcan (撃砕バルカン, Gekisai Barukan), the Blasting Missile (爆砕ミサイル, Bakusai Misairu), the Lumbering Saber (伐採セイバー, Bassai Seibā), the Dictatorship Hurricane (独裁ハリケーン, Dokusai Harikēn), and the Salvation Cell (救済セル, Kyūsai Seru), which allows another party to rebuild him.
After reviving Brajira as Buredo-RUN, who later saves her, Metal Alice takes interest in the concept of friendship and realizes the Goseigers cannot be underestimated.
The Earth Salvation Plan (地球救星計画, Chikyū Kyūsei Keikaku) is the name of an operation and movement launched by Brajira to destroy the Earth based in the Matrintis Empire's underwater base Terminel, renamed Labyrindel (ラビリンデル, Rabirinderu), and serves as the final villain faction faced by the Goseigers.
[28] While working undercover within the Yuumajuu as Buredoran of the Chupacabra, he sealed their leaders Makuin and Kinggon within the Erurei Box and became obsessed with his mission as a Gosei Angel to the point of fashioning the Earth Salvation Plan to destroy the world and remake it in his own image.
During the events of the crossover film Tensou Sentai Goseiger vs. Shinkenger: Epic on Ginmaku, Brajira revives himself as Buredoran of Chimatsuri, assumes leadership of the Gedoushu, and brainwashes Shinken Red in a scheme to transfer the Sanzu River's waters into the Gosei World.
[39] Amidst their own battles with the Goseigers, the Matrintis Empire find Brajira's near-lifeless body, rebuild him as Buredo-RUN of the Cyborg, and remove most of his memories.
Upon resurfacing and revealing his true identity to the Goseigers, Brajira captures and reprograms Gosei Knight to serve him while using Warstar's military might, the Yuumajuu's magic, and the Matrintis Empire's technology to enact the Nega End Ceremony.
[6][44][28] The poisonous, cycloptic, bat-like Bibi Bugs (ビービ虫, Bībi Mushi) are living products of the dark aspects of previous alien races that Warstar conquered.
[46] While most of the Bibi Bugs are destroyed following Brajira's death, during the events of the special Tensou Sentai Goseiger Returns, one surviving specimen called the King Bibi Bug (キングビービ虫, Kingu Bībi Mushi) possesses Yumeko Hoshino in an attempt to seek revenge on the Goseigers and feed on the darkness in humans' hearts.
He gains the ability to evolve into a humanoid form called King Bibi (キングビービ, Kingu Bībi),[54] but the Goseigers foil his plans before destroying him with Ground Gosei Great.
[54] Similarly to the Gosei Angels, Brajira utilizes Dark Headders (ダークヘッダー, Dāku Heddā), multi-headed monsters meant to become wedges as part of their master's Nega End (ネガー・エンド, Negā Endo) ceremony.