Story
-   Tube sends Princess Ial as "Mio" to spy on surface world, but she and Takeru fall in love
-   Tube kidnaps Mio, imprisons her in ice
-   Takeru becomes Red Mask of Maskmen, a group of martial artists who use their Aura Power under Commander Sugata's direction to defeat the Tube

Maskmen

-   all wield Laser Magnums with two modes: gun or sword

-   group weapons include Shot Bomber (early), Jet Cannon (later)

Red Mask (Takeru)

-   23-year-old formula 1 racer and karate expert
-   armed with Masky Blade, Laser Arrow

Black Mask (Kenta)

-   21-year-old kung fu expert
-   armed with Masky Rod

Blue Mask (Akira)

-   16-year-old Chinese boxing and broadsword expert
-   armed with Masky Tonfas

Yellow Mask (Haruka)

-   19-year-old ninja
-   armed with Mask Rotor yoyos, Shadow Split Bodies.

Pink Mask (Momoko)

-   19-year-old tai chi chuan expert
-   armed with Masky Ribbon

X1 Mask (Asuka Ryoo)

-   prototype Maskman in green, in one episode only
-   early precursor to later sixth member concept

Commander Sugata Sanjuurou

-   scientist and martial artist who founded the team

Vehicles
-   Spin Cruiser: Red's modified Formula 1 car, now a buggy

-   Mask Loaders: motorcycles for Black through Pink

-   Turbo Ranger: flying fortress carrying the five components of Great Five

Great Five
+ + + + =
-   Masky Fighter (Red) + Drill (Black) + Tank (Blue) + Jet (Yellow) + Gyro (Pink) = Great Five
-   first five-piece sentai robo
-   armed with Photon Lizer Sword (Final Aura Burst), Gyro Cutters, Great Gun

Land Galaxy
->
-   Land Galaxy -> Galaxy Robo
-   armed with Iron Fist Aura Galaxy, Galaxy Drill, Galaxy Anchor, Galaxy Bazooka

Underground Empire Tube
-   once a peaceful underground empire, corrupted by usurper Zehba, who now intends to rule surface world
-   Angler Soldiers: black-skinned grunts with brown vines growing down from their heads

-   Earth Empire Beasts: monsters; underground creatures released from a freezing cave; many are composed of Dogler beasts plus parasites
-   Angramon Fighters: fighter planes, untie into centipede-like monster, Angramon Snake
-   Earth Imperial Castle: tube headquarters, rises to Earth's surface in finale

Earth Emperor Zehba

-   hates all human beings
-   secretly the child of Lethal Dogler monster slain by original Tube royal family

Prince Igam

-   true heir to throne
-   woman raised as a man, ends up a nun after reforming

Princess Ial/Mio

-   Igam's twin, falls in love with Takeru

Commander Baraba

-   swordsman of Baluga Tribe

Earth Imperial Ninja Oyobur

-   red-skinned, pointy-eared ninja of Buyon Tribe

Earth Imperial Ninja Fuumin

-   female ninja of Fu Tribe, serves Prince Igam

Anagmas

-   elderly, overweight beast who knows all

Thief Knight Kiros (27-49)

-   equestrian who loves Ial
-   armed with knife and sickle, uses Crescent Screw attack

Okelampa

-   insectoid, fires a monster enlarging beam