Kid vs. Kat/Characters

Cooper "Coop" Burtonburger
A 10-year-old boy who knows Kat is evil. He tries to stay out of trouble, but is often humiliated and injured when trying to prove Kat's true identity. He gets the blame for everything Kat ruins in the house. Coop sometimes thinks Mr. Kat plans is to take over the world, but Mr. Kat's plans are to return home or just to get food for himself. Coop may have misunderstand Mr. Kat most of the time. Coop's father thinks that Cooper is insane for thinking that Kat is an evil alien. Only Dennis, Coop's best friend, and later Fiona, as well, believe in him. The Burtonburger's neighbor, Old Lady Munson, hates Coop, but favors Millie, and she has a many greats-grandniece, Fiona, who Coop likes. Coop has brown hair and blue eyes.
 * The Hero
 * Butt Monkey
 * The Ace - Subverted. Coop could have easily been the smartest, most popular kid in town if he didn't have Kat to worry about.
 * The Cassandra - Nobody ever believes him about Mr. Kat.
 * The Scapegoat - If something goes wrong, no matter what the circumstances, people blame Coop.

Mr. Kat
A space alien who looks like a hairless Sphynx cat. Kat is adopted as a stray kitten by Millie Burtonburger. Blaming Coop for being stranded on Earth, Kat hates Coop though at times he and Coop get along, in-fact whenever trouble threatens both of them they work together as revealed in "Just Me and Glue." Kat tries to get home only to be interfered with Coop. There is a possibility that he likes Millie as he has been acting affectionate with her and even sleeps in bed with her. However, his affection for Millie may be fake. For example, in the episode "One Big, Happy Family" when Millie fell for a trap Mr. Kat made, Mr. Kat tried to save her. It's unknown whether if it was because he cared about her safety or she would just mess up his plan. In "Pet Peeved" Mr. Kat got jealous when Millie ignored him, it proves that Mr. Kat truly does like Millie.
 * Alien Animals - Kat and the rest of his race happen to look and act like Earth cats, providing the plot of the show.
 * Axe Crazy - When provoked.
 * Badass
 * Butt Monkey
 * Cats Are Mean - Even alien-cats it seems.
 * Devil in Plain Sight - It's surprising how few people notice what he really is.
 * Formally-Named Pet
 * Robotic Reveal - "Nip/Duck" reveals that Kat is actually a cyborg.
 * Villainous Glutton - He really loves cat food.

Millie Burtonburger
Coop's younger sister and the "owner" of Kat. She loves Kat and is oblivious to the fact that he is an alien, and sometimes, she interrupts his evil plans. She can scream so loudly that the whole town can hear her. They call her the "master manipulator". Her father does everything she says. Millie has black hair, and she wears red glasses.
 * Annoying Younger Sibling
 * Bitch in Sheep's Clothing
 * Daddy's Girl
 * Idiot Savant - Millie will usually turn out to be pretty skilled at whatever activity Burt tries to get her interested in - Whether it's building houses of cards or running the family store. But not at bowling, it turns out.
 * Spoiled Brat - Throws tantrums if she doesn't get what she wants.

Dennis
Coop's best friend, he is the one of the only people that believes Coop, their birthdays are only one day apart, and they always wish for the same presents. Dennis has black hair and black eyes.
 * Butt Monkey
 * Chaste Hero - Has little to no interest in romance, and reacts with terror when flirted with.
 * Deadpan Snarker - Whenever Coop goes too far off the deep end.
 * The Lancer
 * Only Friend - The only kid willing to consistently stay friends with Coop despite his obsession with defeating Kat.
 * Only Sane Man - Quite often

Burt Burtonburger
Father of Coop and Millie Burtonburger. He is constantly stressed out due to Coop's "misbehaving". He owns the House of Swap. Burt has brown hair and black glasses.
 * Bumbling Dad
 * Repetitive Name

Old Lady Munson
A nosy old woman who is the next-door neighbor of the Burtonburgers. She is grumpy and mean to all the children and adults, though she favors Millie over Coop. She has a many greats-grand neice named Fiona, whom she tries to keep away from Coop.
 * Cranky Neighbor
 * The Munchausen - In "Down The Creek".
 * Older Than She Looks - You'd hardly believe that was possible, but yeah, apparently she is.

Phoebe
A girl who has an unrequited crush on Coop and constantly annoys him. Phoebe clearly despise Millie (partially because Millie "owns" Kat and Phoebe owns Honeyfluff - an inferior, white-haired, obese cat). She has brown eyes, brown hair and brown skin. Henry is Dennis' father. They have the same head shape, but Henry is almost bald. He and Burt see everything as a competition.
 * Ambiguously Brown - Though her father seems to be Hispanic.
 * Stalker with a Crush - Phoebe can be less than subtle about her crush on Coop. After Fiona's appearance, she got worse.
 * Yandere - She's pretty terrifying when she wants to be.

Fiona
Old Lady Munson's great great great great great grand neice. She is aware that Kat is an evil alien and Old Lady Munson tries to keep her and Coop apart. She has blonde hair and green eyes.
 * Action Girlfriend - She enjoys several sports and can easily keep up with Coop during fights against Kat.
 * Affirmative Action Girl
 * Green Eyes
 * Hair of Gold
 * Not So Above It All: She can be as pig-headed and stubborn as Coop, which lead to a row between them.
 * Plucky Girl
 * Promotion to Opening Titles - After her first debut.
 * Youthful Freckles