In the 'the lyle and erik menendez story', Lyle and Erik Menendez are brothers. They are known for their heinous act of killing their parents. Their case got a lot of media attention and raised many questions about family and crime.
Since it's a fanfiction, Erik Lehsner could be an original character created by the author. He might be a fictional being with certain special traits or powers that are important to the story. Maybe he's a supernatural entity, like a vampire or a wizard, which would add an interesting dynamic to his relationship with a human.
There are quite a few. Another option is to look for fanfic anthologies related to the fandom that Chloe Sullivan is from. These anthologies often collect various fanfics in one place. And don't forget to read the reviews or comments on the fanfics if available, as they can give you an idea of whether the story is well - written and engaging.
I'm not sure specifically which 'Sullivan' you are referring to. There could be many people or things named Sullivan. It could be a family name, a brand name, or the name of a character in a story. Without more context, it's difficult to tell the origin story.
I don't have enough details to tell the whole story of Danny Sullivan in 1979. It could be that Danny Sullivan had some personal achievements, like starting a new job, or it could be related to a community event. If you can give more context, it would be easier to answer.