Reborn As the CharacterThat Never Existed

After dying four years ago, a writer who is skilled at making tragic characters was reborn into one of the novels she wrote, but as Thalia Remetio, a character that didn't exist in her story. Thalia is the older sister of Loina Remetio, the female protagonist. Fortunately, Loina and the second male lead will have a decent childhood. However, unfortunately, this is only because they are destined to face many hardships in the future. Knowing the fate of not only Loina but all of the characters she loves, what will Thalia do now?