Catformers (Decepticons version)

The Decepticons are a group of war-torn soldiers led by Megatron. Their home planet is Cybertron, but the war there destroyed the planet and all life on it, forcing them to flee. They traveled on a massive ship called the Nemesis. Later, they arrived on Earth, specifically in Nevada, USA, where they continued their fight against the Autobots.

Megatron (Leader of the Decepticons): He is a large cat with red eyes, gray fur with some darker or lighter streaks, and his coat is usually abundant.
Megatron is authoritarian, ambitious, intelligent, calculating, imposing, proud, cruel, ruthless, charismatic, resentful, persistent, and deep down, idealistic; he has a certain obsession with power and control.

Starscream (Megatron's second-in-command): He is a smaller and thinner cat than Megatron, with red eyes, short, light gray fur with darker, black streaks, and a red stripe on his head.
Starscream is ambitious, sometimes desperately trying to overthrow Megatron, which never works and he always ends up getting beaten by him. He is vain, cowardly, treacherous, manipulative, intelligent and resourceful, spiteful, sarcastic, opportunistic, insecure, and resilient. Despite all his defeats and humiliations, he rarely abandons his goals. Despite how foolish and cowardly he is considered, he can be competent on occasion.

Knockout (Doctor): Knockout is a cat with a build similar to Starscream, thin and with short, but very well-groomed fur, his eyes are red, his fur is red, with lighter and directly white strands on his face.
Knockout is charismatic, quite vain, very proud of his appearance, sarcastic, boastful, practical, cowardly in certain situations, doesn't take too many risks for a cause, intelligent and competent in his medical practice, at least when he was a Cybertronian, materialistic, loyal to the Decepticon cause out of convenience, not as cruel as other Decepticons, although he can be ruthless, has moments of pragmatism and concern for his people, is often very theatrical, tends to behave and speak with a dramatic and extravagant touch, enjoys his work, even in unpleasant situations he maintains a surprisingly relaxed attitude

Breakdown (Knockout's Assistant): Breakdown is a larger and more robust cat, almost the size of Megatron, and larger than Starscream and Knockout. His fur is a bit more abundant and fluffy, mainly blue, but also has parts, such as his paws, tail, or rear area, that have black and gray colors. His eyes are yellow, and his face is orange. His tail is small and appears to be docked.
Breakdown is quite strong and physically resilient, loyal to Megatron and Knockout, with whom he has a strong camaraderie. His relationship with Knockout stands out among the normally distant Decepticons. He is serious, pragmatic, brave, disciplined, proud, taciturn, and protective, especially towards Knockout. Although he can be brutal in combat, he doesn't convey the same cruelty as Megatron; he is calmer and more honorable.

Soundwave (Communications and Espionage Officer): He is a cat that is not necessarily small, but very thin, his fur is short and dark purple, his eyes are black
Soundwave is extremely quiet, almost never speaks, communicates in other ways, is impassive, quite loyal to Megatron, disciplined, quite intelligent, calculating, efficient, very mysterious, not very expressive, threatening, ruthless when necessary, and protective of his team, especially a small purple bird that accompanies him, named Laserbeak, who also doesn't speak but helps Soundwave.

Shockwave (Scientist): Shockwave is a large cat, almost the size of Breakdown and Megatron, with a mostly purple and quite abundant and fluffy coat, his left paw is completely gray, his eyes are red
Shockwave is extremely logical, seemingly devoid of emotions or feelings; cold, distant, calculating, intelligent, obsessed with science, pragmatic, direct, obedient, and persevering. His tranquility and cold manner of speaking are often unsettling. Extremely focused, he is practically the most intelligent Decepticon on the ship.

Dreadwing (He was a temporary replacement for Starscream's position as second in command): Dreadwing is a large cat, with abundant fur, mainly dark blue, with a yellow face and red eyes.
Dreadwing is honorable, loyal, disciplined, serious, proud, brave, very military, protective, respectful to anyone he considers a capable warrior, traditionalist to the ancient customs of Cybertron, firm and vengeful. He has a twin brother, currently deceased at the hands of Starscream, whose name was Skyquake.

Previous Insecticons, Shrapnel, Bombshell, and Kickback (Storm Troop): All three are large cats, the same size as or larger than Megatron, with colors such as black, dark green, and yellow, and red eyes.
These three are aggressive, instinctive, don't act much by reasoning, are not very communicative, obedient, territorial, extremely resilient, are a danger individually, this increases when attacking in a group, predators, don't care much about their survival, brutal, and have a hive or swarm mind, acting as one

Predaking (Shockwave's Experiment) He is the largest cat on the ship, much larger than Megatron. His fur is like a leopard's, with darker, orange, and brown tones, and yellow eyes.
Predaking is proud, imposing, fierce, intelligent, independent, dignified, distrustful, loyal if it develops a bond, protective, stubborn, emotionally intense, and has a great thirst for freedom. It seeks recognition for its autonomy and nature, hates feeling used or belittled, and if it senses any of this, it reacts very strongly.

Vehicons (Soldiers): The Vehicons are a group of identical, small, thin cats without authority; they are merely soldiers or helpers. They are short-furred cats in shades of purple, gray, and black. The only one who stands out is named Steve. They are clumsy but know how to fight.

List of Autobots

Optimus Prime (Leader)
Ratchet (Doctor)
Bumblebee (Explorer)
Bulkhead (Warrior)
Arcee (Explorer)
Wheeljack (Inventor, mechanic, and scientist)
Smokescreem (Young recruit)

Humans who help the Decepticons

Miko (Bulkhead's teenage friend) is a Japanese teenager who enjoys heavy metal music; she is wild and brave.
Raf (Bumblebee's friend) is a computer genius and very calm.
Jack (Arcee's teenage friend) is an intelligent and responsible teenager