There might be a little something to that notion. Remember, each of the characters is not only a parody of a well-known cartoon icon, but a parody of the basic personality types found on reality shows as well. For example, Foxxy is the sassy black woman, Clara is the naive daddy's girl, Xandir is the token gay man, etc. Toot might have initially been envisioned as a goth parody. Her cutting herself "to relieve the pain" in the first episode backs this up. If that was the case, though, they never followed through on it. Once they came up with the manipulative bitch angle, they decided to follow that route instead, since it's a much more fertile ground for comedy.