Libby Smith developed several relationships over the course of the series.


Cindy and Libby
First Episode: "The Other 48 Days"
Origin: Cindy and Libby were stranded together for 48 days after the crash of Oceanic Flight 815.
Since Then: Libby and Cindy spent 48 days together on The Island. They fished, took care of Emma and Zack together, and constantly moved around the Island. They found the Arrow Station and were the first Tailies to meet a fuselage survivor, when they saw Jin wash ashore. However, Libby also gave ominous glares at Cindy. Cindy disagreed with Libby to stop and rest for Sawyer while they were in the thickness of the jungle where The Others would come for them. Seconds prior to her abduction when they were climbing the ridge and aiding the makeshift stretcher being lifted to take a gunshot Sawyer uphill, Cindy handed Libby her grey knapsack and walking stick. Moments before this, the two gave each other synchronized nods before embarking upon the task. When Libby got pulled up by Ana Lucia, she apparently never looked behind her once for Cindy, who was right next to her. And when Ana called her name five times after they reached the top of the ridge, Libby took a long time to register Ana’s voice addressing the concern for her absence. It is left unknown why this was the case.
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David and Libby
First Episode: "Live Together, Die Alone, Part 1"
Origin: They married.
Since Then: David never appeared on Lost, but he affected Libby greatly. The two were husband and wife, and when David died, Libby suffered a mental breakdown and had to check herself into Santa Rosa. Despite this, Libby did not appear to think of him after death, and the two did not move on together. She instead awoke with Hurley, a man she knew for less than two weeks.


Desmond and Libby
First Episode: "Live Together, Die Alone, Part 2"
Origin: The two shared a line for coffee. Desmond lacked American currency to pay the bill, and Libby offered to cover it.
Since Then: Desmond jokingly asked for a further $42,000, and when Libby pressed him for details, he explained he needed a boat for Widmore's race. Libby lent him one her late husband gave her. Desmond set sail, and the two never met again while alive, though both coincidentally ended up on the Island for a period years later. Desmond tried to escape it in Libby's boat, and he returned just as the survivors were holding her funeral. After death, Desmond helped connect Libby with Hurley, and he watched from afar as they kissed.
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Hurley and Libby
First Episode: "Fire + Water"
Origin: Hurley became interested in Libby when she joined the castaways.
Since Then: The two slowly formed a relationship that culminated with a kiss. Libby was a positive influence on Hurley as she tried to get him to stay healthy on the island. Following a suggestion from Sayid,, Hurley decided to take Libby to a secluded area on the beach for their first date. When Hurley forgot to bring blankets, Libby offered to retrieve them from the hatch. Michael, startled by her appearance after having just shot Ana Lucia, shot Libby in the stomach. Hurley watched her die, dug her grave and spoke at her funeral. Hurley visited her grave regularly for the rest of his time on the Island, but though ghosts began visiting him afterward, Libby's never did. After death, he ran into Libby when a blind date stood him up. He learned she was a Santa Rosa inmate, but he pursued her regardless and eventually took her on a beach picnic that replaced the date they'd missed. They kissed, waking him up.
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Jin and Libby
First Episode: "The Other 48 Days"
Origin: Libby discovered Jin's body washed up on the beach after the raft explosion.
Since Then: Libby couldn't understand Jin's Korean, and each suspected the other was an island native. Once they realized they were survivors from the same crash, they traveled together across the Island. Libby followed Jin's instructions for caring for Sawyer. She encouraged Michael to leave Jin and obey Ana's demands for supplies, and later convinced Ana to let Jin return to his camp. Once the two camps had merged, Hurley and Libby tried to go on a picnic. Libby pointed out Jin to prove that they had arrived at their own beach rather than another.

After death, Jin and Libby greeted each other in the church before moving on.

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