Subtitle: Killer Plant
Dinosaur Squadron Koseidon
- Sigma-1 was a very sneaky enemy. Though it got noticed by a Pteranodon, it quickly killed it.
- Sigma-1 is one of the two plant Terror-Beasts in Dinosaur Squadron Koseidon with the monster, Baribaa being the second plant Terror-Beast.
- Weakness: Sigma-1 can burn if it gets in contact with sunlight, which was noticed by Koseider, and was ultimately defeated by this weakness.
- Powers and Weapons
- Possessing: Sigma-1 can posses dead humans, and it did this to not get noticed.
- Whips: Sigma-1 has 2 whips on the hands, which it can use to grip things and throw them, or to strangle things with it.
|Dinosaur Squadron Koseidon Kaiju|
|Princess Altasia | Big Lagee | Futabasaurus | Pteranodon | Brontosaur | Nipponosaurus | Triceratops | Tyrannosaurus | Stegosaurus | Dimetrodon | Corythosaurus | Emperor Godmes | Alien Godmes | Commissioner Zaji | Leader Jericho | General Kesnochi | Shogun Gaban | Sigma-1 | Destron | Galias | Gomer Corps Commander | Demoth | Gibra | Gibras | Killer Dinosaurs | Piragia | Kinokong | Magma Person | Grandon | Baribaa | Tyrannosaurus Jackie | Gaos | Eredon | Doctor Ogimura | Gigi | Dr. Sabata | S-1 | Alien Mosgis | Cyborg K2 | Alien Dakiron | Julie | Cosmo Plums | Cyborg B1 | Dr. Kuroiwa | Cyborg B2 | Cyborg Combatants | Dr. Kuramochi | Franken No.1 | Franken | Alien Devil Akumazy | Evil Samurai | Kishida Gounosuke | Tsumura | Cyborg Guardsmen | Doctor Dark | Phantom Shiraki | Alien Holosto | Nishiyama | Cyborg | Alien Yapu | Aliens | Ragout | Satar | Dr. Munakata | Professor Kisaragi | Bemgan | Kiska | Robot Weapon Nova|