 Upon landing on the Island , she decides to join Sayid on a hike to transmit a distress signal , after she and Boone have an argument about her selfishness . When they discover a French looped signal already being transmitted , Shannon 's knowledge of the language is used to translate it . Later , Shannon has an asthma attack , but her inhalers are nowhere to be found . Sun ( Yunjin Kim ) cures her , by using eucalyptus plants to help her breathing . Because of her selfish and manipulative behavior , Boone brands Shannon useless . Sayid enlists her to help translate the maps belonging to the French woman who made the radio transmission , Danielle Rousseau ( Mira Furlan ) . Shannon and Sayid soon form a romantic relationship . After returning from a romantic night along the beach with Sayid , she learns Boone has died after falling from a great height . At his funeral , Shannon does not speak , but allows Sayid to talk instead . Shannon holds Locke ( Terry O 'Quinn ) responsible for Boone 's death , and asks Sayid to take action . When he refuses , she steals the key to the gun case from Jack Shephard ( Matthew Fox ) and holds Locke at gunpoint in the jungle . When Rousseau arrives on the beach one morning to warn the camp of the Others ' imminent arrival , Shannon prepares to migrate to the caves with the rest of the group . Before leaving on the raft the survivors have built , Walt Lloyd ( Malcolm David Kelley ) gives Shannon guardianship of his dog , Vincent , as a means to help her recover from her loss . 
