Liliana-san is the main character of Wagaya no Liliana-san, a comedic fantasy-style series centered on a mysterious girl living in the protagonist's home. She is portrayed as an unusual, charming, and often teasing presence whose interactions drive much of the story’s humor and everyday situations. As the title character, she serves as the focus of the series and the catalyst for the household dynamics, blending cute, eccentric, and supernatural or otherworldly traits depending on the story’s interpretation.