I have a serious brain disease. Please give me a cat.

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Da Wikipedia:

Eleanor Abernathy (Tress MacNeille), better known as the Crazy Cat Lady, is a woman with the appearance and behavior of a stereotypical mentally ill person. She first appears in the episode Girly Edition where Lisa interviews her for a news segment. She is always surrounded by a large number of cats, and in every appearance she screams gibberish and/or throws cats at passers by. Kent Brockman later reveals her true name to be Eleanor Abernathy. She gives Lisa her cat, Snowball V, who looks exactly like her original Snowball II. She briefly becomes sane in "Homer and Ned's Hail Mary Pass" thanks to some pills that she shows the Simpsons but returns to her bizarre behaviour after Marge mentions the pills are Reese's Pieces. With medication, she is very intelligent. When participating in a mayoral election, unlike the other candidates, she discusses situations such as health care, economy, and public education in between her screams and gibberish.

In the 18th season episode Springfield Up, which flashes back to the childhood of various adult Springfielders, it is revealed that she actually has a somewhat tragic life story. When she was eight, she was a smart and ambitious young girl, similar to Lisa Simpson, who wanted to be both a lawyer and a doctor "because a woman can do anything".She was studying for law school at sixteen, and by twenty-four she had earned a MD from Harvard Medical School and a JD from Yale Law School,. However, at 32, she suffered exhaustion, turned to alcohol, and became obsessed with her pet cat.By the time she is forty, she assumes her present appearance and behavior.