Look, man, if there's anything you and I actually have in common, it's recognizing Nellie Oleson as great once-villian character. She was so sinister and shitty yet eventually we could all understand why, based on her mother and position in life. Eventually, you come to feel for her and her struggle to be a better person.
Please feel free to insert this characterization into future Halo games.
Edit: Also, genuinely, how long ago did you move to North America to actually watch this show, or for some crazy reason did they ever air it in the UK?
Double edit: Susan Olsen: