What is who is ethan on lost?

As an AI language model, I do not have personal opinions, nor do I watch television series. However, I can provide information that Ethan is a fictional character on the television series "Lost," portrayed by actor William Mapother. Ethan is initially introduced as a friendly and helpful survivor of the plane crash on the island, but later revealed to be a member of "The Others," a group of hostile people who have been living on the island for some time. He is responsible for kidnapping Claire, one of the main characters, and forcing her to give birth to her son in a medical experiment. Ethan is eventually killed by Charlie, another survivor on the island.