Julia (The Simpsons)

Julia was Homer's manager after he became a famous opera singer in the episode The Homer of Seville

History
She first saved Homer and Marge from an angry mob of fans before becoming Homer's manager. She tries to seduce him multiple times such as writing messages on her eyelids or disguising herself as Marge in his bed, but Homer refuses. Not accepting refusal, she tries to kill Homer, first with a Cobra placed in his cereal box, and later with a poisoned blowdart disguised as a conductors baton, during a showing of The Barber of Seville. However, both attempts were thwarted, first by Homer repeatedly whacking the cobra against the refrigerator door causing it to be dazed for the remainder of the morning, and the second when Marge stops her by hurling a French horn in the way, causing the dart to redirect back at her. However, the snipers actually saved her from poisoning by shooting her and then crashing the chandelier on her, squeezing out the remaining poison. While she is being sent to an insane asylum, she swears vengeance on Marge and hinting that a cable company is going to be involved in her revenge