Liliana Sanctis is a central character in the series 'Wagaya no Liliana-san'. She is a mysterious and elegant woman who arrives at the protagonist's home under unexpected circumstances. Known for her charisma and beauty, Liliana quickly becomes an integral part of the household. Her presence brings both comedic and heartwarming moments, as she adjusts to the new environment. Throughout the series, her enigmatic past is slowly revealed, adding depth to her character and driving the narrative forward. Liliana's role is pivotal, as she influences the lives of those around her, bringing about change and growth.