Lo Blacklock is a fictional character created by author Ruth Ware. She is the protagonist in the psychological thriller novel titled "The Woman in Cabin 10". In the story, Lo is a travel journalist who embarks on a luxury cruise, only to witness a mysterious disappearance. As the plot unfolds, Lo becomes increasingly entangled in a web of secrets and lies. Her determination to uncover the truth leads her to confront her own fears and insecurities, making her a relatable and complex character. The novel explores themes of trust, isolation, and the impact of trauma.