Deckerstar

Deckerstar is the het ship between Chloe Decker and Lucifer Morningstar from the Lucifer fandom.

Canon
Lucifer and Chloe first met on a murder investigation of Deliah who is a friend of Lucifer. Lucifer became interested in her after he discovered that she is immune to his charms. While Chloe was annoyed by Lucifer, she does like to work with him and she use his skills to find answers on the cases that they're working on. During the times they work together, Lucifer learns how to be a better person from Chloe.

At the near end of Season 1, Lucifer learned that being near Chloe makes him vulnerable. But a little bit after he found out, he would do anything to protect her, even it includes getting hurt in her presence.

In Season 2, Lucifer went down to hell in order to get a cure for Chloe who was poisoned.

In Season 3 bonus episode: Once Upon a Time, that episode takes place in an alternative world. This episode brings the question: What if Lucifer and Chloe haven't met? But in the end, they ended working together on solving cases. God even clarifies in this episode that no matter what happens in any circumstances, these two will end up to be together in the end.

Fanon
Deckerstar is the most popular ship in the Lucifer fandom.

Trivia

 * Chloe is Lucifer's first real love.