Evelyn

Evelyn is the girlfriend of Patty Bouvier.

History
After Lou and his sister pulled out of the yearly holiday the Van Houten family holds in their villa in Costa Rica, Patty and Evelyn went along instead, much to Homer's horror. At first, Homer and Evelyn act coldly to each other, due to Homer and Patty's distaste for each other. However, during a meal, Homer and Evelyn were both watching the Omaha Cornhole International on their phones. Upon realizing they both enjoyed it, they started to bond due to their many similarities.

The next day, the rest of the attendees decided to go shopping. Homer and Evelyn decided to stay behind at the beach. When everyone returned, they found the villa was a mess and monkeys were everywhere, as Evelyn and Homer had both gotten drunk. After this incident, Marge asked Homer to stop spending time with Evelyn so they could have a decent vacation.

When everyone was on a hike, Homer tried to stay away from Evelyn. However, Evelyn poured some alcohol into Homer's flask and they both got drunk. At a swimming hole, Marge and Homer were trying to take a selfie, when Marge realized that Homer was drunk, because of Evelyn. Evelyn then showed off to Homer, doing a dive into the water, which caused Marge's phone to fall into the water and get taken by a fish. At dinner that night, Marge told Patty that Evelyn was a bad influence on Homer and that Evelyn was Patty's Homer.

At some point after the meal, Patty broke up with Evelyn, because she could only see Evelyn as Homer now. When everyone on holiday went zip-lining, Marge convinced Patty to give Evelyn another chance, because unlike Homer, Evelyn loved Patty, which made Homer and Evelyn different. The two of them then made out on the zip-line.