Eliza Pancakes is one of the most infuriating sims in this game, or at least for me she is. I went and looked up her information and her traits are Materialistic, Neat, Perfectionist, and the other...
Yeah...she does pick a lot of fights. I had the "welcome wagon" thing that happens in the start of your game and she came over and basically started arguing with one of my sims. Though I do like her last name! lol