With his Knuckle Riser, Tenma transforms into Sazer Tarious (セイザータリアス, Seizā Tariasu), the Flame warrior under the sign of Sagittarius, his armour is shaped after a falcon in red colour.

With her Knuckle Riser, Mika transforms into Sazer Mithras (セイザーミトラス, Seizā Mitorasu), the flame warrior under the sign of Aries, with a white and red armour shaped after a swan.

With his Knuckle Riser, Ken transforms into Sazer Lion (セイザーリオン, Seizā Rion), the flame warrior under the sign of Leo, his dark red armour is shaped after a swallow with black colour on his arms.

With his Knuckle Riser, Akira transforms into Sazer Remls (セイザーレムルズ, Seizā Remuruzu), the wind warrior under the sign of Gemini, with armour shaped after a Japanese rhinoceros beetle in the colour of indigo (bluish purple).

With her Knuckle Riser, Ryouko transforms into Sazer Velsou (セイザーヴェルソー, Seizā Verusō), the wind warrior under the sign of Aquarius; her magenta-coloured armour is shaped after a butterfly.

With his Knuckle Riser, Jin transforms into Sazer Dail (セイザーダイル, Seizā Dairu), the wind warrior under the sign of Libra; his purple armor is shaped after a stag beetle.

With his Knuckle Riser, Naoto transforms into Sazer Tawlon (セイザータウロン, Seizā Tauron), the ground warrior under the sign of Taurus, whose armor is shaped after a bull in yellow color.

With his Knuckle Riser, Gou transforms into Sazer Tragos (セイザートラゴス, Seizā Toragosu), the ground warrior under the sign of Capricorn whose his armour is shaped after a goat with a colour of light orange.

With her Knuckle Riser, Ran transforms into Sazer Visuel (セイザーヴィジュエル, Seizā Visjueru), the ground warrior under the sign of Virgo; her armour is shaped after a female leopard in orange colour.

With his Knuckle Riser, Makoto transforms into Sazer Gorbion (セイザーゴルビオン, Seizā Gorubion), the water warrior under the sign of Scorpio; his armour is shaped after a shark in royal blue colour.

With his Knuckle Riser, Tappei transforms into Sazer Gans (セイザーギャンズ, Seizā Gyanzu), the water warrior under the sign of Cancer, his armour is shaped after a manta ray in sky blue.

Being of Planet Marius (マリウス, Mariusu), with the power to give her lifeforce to others, Luka (ルカ, Ruka, 42–43) was sent to Earth by Belzeus to unknowingly unseal the Bosquito, summoning Gig Fighters to hold the monster off until Tarius arrives.

After seeing that the Gransazers were nothing like the Bosquito and Tarious' resolve to protect the Earth, Luka questions her actions, and Tenma convinces her to leave Warp Monarch.

The Akelon (アケロン人, Akron-jin) race were the first alien menace to battle the Gransazers, their abilities include stretching arms, super speed, and shooting blasts of lightning.

Though she had the upper hand against the two Chouseishin, Karin retreats to the valley hill to heal her burn injuries by Garuda, taking Akira into the beast for one last chance to join her before she resumes her attack.

From the remains of Karin, Tsubaki of the JSDF science division begins to secretly mass-produce stronger Clo-Akelon (クローンアケロン人, Kurōn Akeron-jin) (28-29) that would serve as bio-weapons to ensure Japan would be a greater world power.

However, Logia summons DaiLogian to Earth and use it to destroy the Gransazers once and for all for the sake of his fallen comrades, taking out Tawlon, Remls, before going after Gorbion in a plan to upset Tarious.

However, he survived his suicide and resurfaces upon regaining Dailogian and his Hiro-Sniper from the JDSF's Scientific Research Lab, beginning his vendetta against the Gransazers by kidnapping Ryouko and Ran and capturing Tappei, leaving them at the mercy of a time-bomb while he goes after Tarius to personally kill him.

Refusing to give up, Logia abducts Mika who tends to his wounds before he lets her go as he goes to hunt down the Belzeus-controlled DaiLogian and reclaim it as he and Tarious settle things in a one-on-one fist fight.

Impactor Lucia (インパクタールシア, Inpakutā Rusia) (13-22), who came to earth along with Radia, is a swift and cunning fighter who assumes the form of a woman in her twenties with a red streak in her hair, wearing a green leotard and a cape.

But when Lucia is wounded, Radia decides to complete the mission on his own, fighting Gorbion and Pisces until he enlarges into a giant as Gans arrives and the gathered Water Tribe awaken Leviathan.

The underhanded Bisilians (ビズル星人, Bizuru Seijin) (26-27) are sent to destroy Earth, sending an operative and a spy to test the first Stage in their dimensional transport system, using it to bring humans where they eventually disintegrate instantly.

After Ran, Asami apologizes for deceiving him and is mortally wounded by a Bizal Soldier for betraying her race, revealing the location of the Dimensional Transport system as she thanks Ken with her dying breath, reduced to wisps of light.

To that end, he creates supports to his claim by having using Logia to destroy Crystal Slab to hide the truth and Luka to resurrect the last Bosquito to give Warp Monarch to attack Earth in full fury.

Sent by Belzeus to exterminate Ruby before she could awaken Ran's power, Gorgion (ゴーギャン, Gōgyan) (49-50) attacks the JSDF before being hindered in his mission by Dail, who manages to defeat before injuring Velsou.

The Bosquito (ボスキート, Bosukîto) (42-45) is an alien construct that absorbs any lifeform in its grasp, for nourishment, into order to reproduce asexually, and able to assimilate the energy of its clone spawn when they die.

Levithan and Gunceasar are summoned to weaken Garuda so eject the Bosquito, who starts to absorb the floral life energy to regain its strength and create two clones of itself.

Remls' Sazer Gear equips Dorcrus with a giant version of the Iron Gale on his head, since Dolcruz does not have proper hands to hold objects (in theory).

ChouSeiJuuren Cloud Dragon (超星獣連クラウドドラゴン, Chôseijûren Kuraudo Doragon), translated into English as Ultra Star Beast Carrier Cloud Dragon, is as old as the ChouSeiShin, another remnant of the ancient civilization and residing within the ozone layer of the Earth to protect it from alien invaders, implanted with a DNA of humanity to start back up the human race and an AI modeled after a woman from ancient civilization.

The Type-05 GS Assist Robot Yuuhi (五式支援機士ユウヒ, Goshiki Shienkishi Yûhi) (28-48)was the result of the JSDF reverse engineering DaiLogian so they can support the Gransazers' Chouseishin.