Worm

The Worms are the villains in the fanfictional tokusatsu series Kamen Rider: Beetleborg. They are an alien life form that came from a meteor that destroyed the city district of Charterville years prior to the series' timeline. However, the Worms known as Natives existed prior to the coming of the Charterville Meteorite, through another meteorite that came 35 years ago.

Charterville Meteorite
A mysterious meteorite that crashed into Charterville years ago, this meteorite brought along the extraterrestrial creatures known as Worms. Rylan Ludwig explains that another meteorite carrying the Natives arrived on Earth thirty-five years ago, explaining why fragments of the meteorite similar to those of the Charterville Meteorite existed so long ago. The Natives that arrived on Earth worked with humans to create the Masked Rider System in order to fend off the threat of other Worms that would arrive later.

Classification
There exist two different species of Worms: the Natives & the unnamed Worms. The Natives have a horn appendage attached to their heads & they are not as aggressive like the Worms.

Natives
The first species of Worm, Natives are the Worms that arrived on Earth 35 years ago on a meteorite predating the Charterville Meteorite. After assuming human identities, they developed the Masked Rider System to give to the humans that would form ZECT. In return, ZECT would protect them from the Worms that would arrive in the Charterville Meteorite. Trent De Groot is the first Native to appear, & it is shown that certain Natives are able to summon the power of the Zecters. More Natives are later revealed, as their alliance with ZECT is clarified. Tanner Timberlake is also revealed to be a Native working for ZECT after an AMB accident forces him back into his Worm form. Sisryaworm, a Worm that was born from a Native mother, is the only Native Worm to be shown outside of a pupa form. Ned, a leader of the Natives later appears, & although he is offered deep respect, he seems to be very hyperactive. Later, it is revealed that Ned actually worked together with Drake in order to turn humans into Natives using a special necklace, as Ned believed that it was no other way for his kind & humans to co-exist. However, some Natives, such as Timberlake, were able to live on as a human because they did not have the same beliefs as Ned. Ultimately, Ned's plan is foiled thanks to Beetleborg & Stagborg.

Worms
The second species of Worm, these Worm are not given a specific name, but they arrived on Earth years ago on the Charterville Meteorite. Aggressive to humans, Worms attempt to blend into the human population by copying the faces of their victims along with their memories. They only require a look at the human to copy their image, but once done so, they attempt to kill the original at all costs. But the Worm believe the person that was mimicked now exists as a part of them due the fact they also acquired their victims' personalities, which can be a hindrance in few cases. Despite being able to copy both image & memory, they are unable to copy certain things such as scent. The pupa form is known as a Salis, taking on the shape of a chrysalis. Salis normally has green body, except for the albino one which has white body. After a Worm is threatened or endangered, it has the ability to molt, revealing a stronger form that can move at blinding speeds which comes from their high metabolism.

It is later revealed that Worm do not need to naturally molt, & their "cast" can be broken off or shattered. They also have the ability to revert back into a Salis form if necessary. When a Worm is destroyed, it explodes into flames that shares its predominant color. The main motifs of the Worm are animals that are arthropods, most commonly insects.

The executives are the only Worm with non-insects motifs. Rena Ayers/Ucaworm, Cammarusworm, Substworm, & Reynold Norwood/Cassisworm are all crustacean-type Worm. The Cochleaworm is surprisingly a mollusk.

Major Worms
Playing a significant role in the series, these Worms are usually Executives or otherwise important Worms that greatly influence the story. This class of Worm are fully evolved & are the the most powerful class. These Worms each have a unique appearance due to their individual evolution.

Executives
The upper-class Worms usually control massive groups of Worms. Very few Executives have been seen, but they each possess an enormous amount of power.
 * Rena Ayers/Uca Worm: The first executive leader Worm assuming the form of Rena Ayers, a woman whose childhood dream was to sing in an opera. The original Rena was a talented singer with a kind heart that wanted to help people. Believing herself to be Rena, she chases after her dream of being an opera singer until her Worm persona eventually resurfaced. She is able to sing one more requiem for Jay on stage, expressing her gratitude to him. Her true form is Uca Worm, the first executive Worm. A cruel & clever planner, she is the one who ordered a Worm to capture (or kill) Jo. In Worm form, she is very powerful & on her first debut, she defeated both Hornix & Dragonborg. She is also the only Worm to "truly" defeat Drew & make him involuntarily power down. Soon after, she discovers the existence of the Hyper Zecter & attempts to retrieve it after she shoved Susanna off a building.
 * Reynold Norwood/Cassis Worm: Norwood is an even stronger Executive Worm, entering the scene after Uca Worm was destroyed. He was followed by six subordinates. He has the "Life of Immortality" ability, which enables him to evolve into a stronger form each time he gets defeated. Each of his forms has natural fighting ability & a unique power of his own. He was eventually destroyed as Cassis Worm Clipeus.

Non-Executive

 * Dalton/Scorpio Worm

Native Class
Natives are commonly shown in an altered pupa form, but a few Natives have evolved & reached a higher stage in the Worm hierarchy. They are the first generation of worm that landed on earth after the meteor hit Charterville.
 * Hemera Underwood/Sisyra Worm: First shown as a co-worker of Roland's at the Bistro La Salle. She was involved in the meteor crash years ago along with Drew. Due to the accident, her parents were killed. She believed that they were murdered by a person wearing a Rider Belt, but after a period of uncertainty she concludes that Drew, despite owning the belt, would never do something like that. After seeing Stagborg wear another belt & discovering that he was Roland, she also began to doubt him. In the end however, she decides to trust both of them as they have helped her so much. She carries a green crystal that originated from Area X, ground zero of the meteor crash. She seems to be able to talk with & read the emotions of inanimate objects, such as drawings & machines. She's quite clumsy & tends to zone out while working, resulting in complaints by customers. Hemera's alter ego, Sisyra Worm, surfaced after Hemera was in danger of being killed by Worms. Like Timberlake, she is a Native who chose not to attack humanity.
 * Drake/Gryllus Worm

Minor Worms
Some of these lower-class Worms are subordinates of Executives, while others have no association with the majority of Worms. They serve mainly as monsters of the week.

Aracnea Worm sub-class
Spider-based Worms.
 * Aracnea Worm Rubor: The first Worm to be killed by Beetleborg executing his Avalanche Break.
 * Aracnea Worm Flavus: A Worm who is destroyed by Beetleborg's Avalanche Slash.
 * Aracnea Worm Nigritia: A Worm who Beetleborg overwhelms in Rider Form before killing it with his Rider Kick.

Verber Worm sub-class
Tailless Whip Scorpion-based Worms that targeted people in white.
 * Verber Worm: Destroyed by Kabuto's Rider Kick.
 * Verber Worm Rota: Destroyed by Drake's Rider Sting.