In an argument, Lisa's ethical and logical viewpoint almost always gives her the moral high ground, her family also realize that Lisa is usually right whenever they do something immoral but Homer's tendency to ignore her, uses the excuse of age to send her to her room when they realize that they are in the wrong.
However, he gets bitten by a zombie at a zombie soup kitchen that Lisa is volunteering at, and Lisa ends up finding him more attractive after he fights off bullies trying to mug them.
Retrieved September 25, 2012.
Milhouse says except for the squirrel that eats their bird food, he and Lisa have nothing to talk about.
In earlier seasons, however, Lisa has been depicted as intelligent yet not as mature due to her squabbling and physical fights with Bart, but she has developed into a more practical being yet her young age also makes her sense of right and wrong slightly malleable at times as she has shown to engage in childish and reckless behavior, proving herself to be like any other Simpson but more grounded and mature.
She has been shown to support PETA although she eats eggs and dairy and the Free Tibetan movement, is highly against animal cruelty and has adopted a diet of vegetarianism from Season 7 and keeping this dietary regime onward.