However, Kim eventually relents and insists that her brothers continue attending the same school as her, threatening to leave if they do. McCorkle recalled an incident in which a fan of the show was very much surprised to learn that the writers were actually men upon meeting them; the fan had always just assumed that they were both young women because of the way in which they characterized Kim. Design, personality and abilities Aware of what does and does not work in television animation, Schooley and McCorkle knew that Kim needed to be a appealing character. Kim's appearance evolved dramatically over the course of three months. The character was originally designed to look like "a pretty standard-looking athletic blonde", which was gradually changed in favor of a more distinctive appearance. At one point, Kim's design was based on that of video game character Lara Croft from Tomb Raider. However, Disney Channel eventually determined that Lara was "not a very real character". Finally, the creators decided to give Kim a more realistic appearance akin to that of a 14-year-old girl as opposed to a bombshell, concluding, "She has a nice, very appealing design, but we just wanted to keep it out of that realm of video game heroine." The creators admitted that Kim would have been their "dream girl" in high school, joking, "She would have been way out of our class though." Director Chris Baily wanted Kim to be designed with "graphic sensibilities" similar to those of the show's backgrounds, creating a 3D character "whose feet can be planted on the ground and communicate a sense of space." For example, when the character is dressed in all-black, Kim was drawn without a white outline so that she virtually disappears when she moves in front of a black background, yet her "simple design" and flesh allows audiences to "fill in where her body is" naturally. The show's female characters are the only characters drawn with lips, only the upper of which is visible. Describing Kim as "a mostly graphic heroine", Animation: A World History: Volume III: Contemporary Times author Giannalberto Bendazzi agreed that the character's "limited animation" was intentional. In the fourth season, the character's signature midriff baring crop top and cargo pants are replaced by a T-shirt and pants because the former outfit was damaged during a fight with Shego. Some viewers noted that Kim's face appeared to be "rounder"