En Daidouji/Fire En/DagFire/Fire Dagwon/Power Dagwon
- Voiced by: Koichi Tochika
The main protagonist and the fire warrior.
- Blade Below the Shoulder: Fire Dagwon's Fire Blade, which extends from the ladder on the fire truck that forms his right arm.
- Cool Car: En's basic vehicle, the Fire Stratos, is a Lancia Stratos police car.
- Elemental Punch: Both Fire En and DagFire use burning punch attacks called Fire Knuckle.
- Meaningful Name: "En" is written with the kanji for "flame".
- Tank-Tread Mecha: Power Dagwon transforms from an excavation vehicle, with the lower frame and treads becoming its legs. It can also assume a Partial Transformation where the legs remain untransformed.
Kai Hirose/Turbo Kai/DagTurbo/Liner Dagwon
- Voiced by: Takehito Koyasu
The speed warrior.
- Catchphrase: "Don't say four or five!" It's a literal English translation of a Japanese idiom that essentially means "Don't grumble."
- Leader Forms the Head: As the leader of the Liner Team, DagTurbo forms the head and torso of (Super) Liner Dagwon and has primary control over those forms.
Shin Sawamura/Armor Shin/DagArmor
- Voiced by: Jin Yamanoi
The weapon warrior.
- Chest Blaster: Armor Shin has a Gatling gun built into the torso of his armor, called the Breast Motor Cannon.
Yoku Kazamatsuri/Wing Yoku/DagWing
- Voiced by: Hiro Yuki
The sky warrior.
- Meaningful Name: "Yoku" is written with the kanji for "wing".
Ryu Hashiba/Shadow Ryu/DagShadow/Shadow Dagwon
- Voiced by: Atsushi Kisaichi
The shadow warrior.
- Blade Below the Shoulder: Shadow Ryu has a pair of giant Shadow Kunai attached to his elbows.
Geki Kuroiwa/Drill Geki/DagDrill
- Voiced by: Hisao Egawa
The ground warrior.
- Drill Tank: Geki's Drill Liner, in its Attack Mode, is a steam train with a drill attached to the front.
Rai Utsumi/Thunder Rai/DagThunder/Thunder Dagwon
- Voiced by: Kappei Yamaguchi
The thunder warrior.
- Chick Magnet: When Rai arrives on Earth to blend in as a normal student, the female students immediately start going after him to the point it starts to terrify him. And then Maria forces him to reveal he's a textbook psychic to the public.
- Reused Character Design: Though some details are altered (including a new head, a new chest plate, and sticking DagThunder on the back) Thunder Dagwon's basic design is based on Galaxy Shuttle from Transformers Victory.
- Voiced by: Miki Nagasawa
En's Childhood Friend who he often butts heads with.
- Voiced by: Naomi Nagasawa
Maria's little brother.
- Voiced by: Yumi Fukamizu
An alien who comes to assist the Dagwon team later in the series.
- Laser Blade: Galaxy Luna has one of these, called the Lunatic Rapier.
- Voiced by: Joji Nakata
The alien responsible for giving the Dagwon team their powers.
- Voiced by: Tsutomu Kashiwakura
The initial antagonist who destroyed the Alien Kens a long time ago.
- Voiced by: Masahito Yabe
One of a trio of brothers who take over the antagonist position later in the series.
- Voiced by: Takashi Nagasako
One of the trio of brothers who take over the antagonist position later in the series.
- Voiced by: Kouji Ishii
Leader of the trio of brothers who take over the antagonist position later in the series.
- Voiced by: Ryuzaburo Otomo
A being with an asteroid-like body that crashed into Sargossa long ago. Able to possess both machines and organisms, he is the root of the prison break leading to the events of the series.