Katherine "Kitty" Ko is a boy-crazy (specifically Eric-crazy) heroine who, despite being a little off-the wall, serves up totally stellar advice!</span>
She wears a short sleeve white shirt with a green and yellow striped tie, a red and green plaid skirt and two red hairclips in her hair. She also wears a pair of knee high socks and a pair of dark black shoes.
Kitty has a huge, almost stalker-like, obsessive crush on Eric. Whenever she says something about her crush on Eric, Eric usually replies 'what?' then Kitty says 'what?' to cover up what she said to him, because she wants to keep her crush on Eric a secret.
Even though she and Vana are best friends, Kitty acts more of her lackey/assistant in the show.
According to YTV's website, both Kitty and Trevor hate each other very much. However, despite of that, in the series, they rarely show any signs of hating each other. Instead, they are shown as rather civil or even friendly to one another. But, there are some episodes that Kitty is shown to be annoyed by Trevor's stupity, while Trevor dislikes her for unspeakable reasons. Nonetheless, they are shown as good friends.
Because Kitty also has a huge crush on Eric, she hates Mandy and even points a laser gun at her the first time she sees her. The animosity between her and Mandy is completely one-sided on Kitty's side and it is unknown wether Mandy will hate Kitty as much as Kitty hates her in season 2 or not.
- In 'Sleepless in Splittsboro' it is revealed that Kitty's nightmare is technology turn against her and Eric hanging out with Vana instead of saving her, and her nicest dream is spending time with Eric.
- Kitty's crush on Eric is similar to Sierra's crush on Cody from Total Drama World Tour.
- Kitty is voiced by Denise Oliver, who also voiced Maurecia from the cartoon called "Wayside", Hazel from "My Friend Rabbit", Yu from "Beyblade Metal Fusion" and Mina Beff from "Grojband".
- In the Funpak shorts, she was voiced by Stephanie Beard.
- Kitty has worn a wedding dress twice in the show:
- According to Todd Kauffman, Kitty is Chinese.
- Kitty likes kittens.
- In the episode 'The Henchmen Challenge' , it showed the only conflict between Kitty and Trevor. Kitty didn't like that Trevor was making Eric cheat and Trevor didn't like that she was trying to get Eric to play fair.
- In Gone Gaga When Kitty was about to kick Vana we see her undersole of her shoes to see a pink bunny, but the shoes kitty wear aren't sneakers.
- Kitty's crush on Eric is also similar to Maurecia's crush on Todd from Wayside.
- Kitty is the biggest fan of Joshua Sideburns, seen in Teenage Mummies in Love and Comic Book Zombies, Kitty does anything to get Joshua as seen in Teenage Mummies in Love, Joshua seems not interested of Kitty actions towards him. in one episode, Vana finally stops Kitty from embrassing Joshua but Kitty didn't give up, Vana cuts the Rope and Kitty falls off all the way down.
- Kitty's crush on Eric is also similar to Isabella's crush on Phineas from Phineas and Ferb.
- Kitty's crush on Eric is also similar to Amy's crush on Sonic from Sonic the Hedgehog.
- Kitty is short for Katherine.
- Kitty has two left feet.