Lulu is a mysterious young girl who wears elaborate lolita fashion and is frequently seen wandering the streets of Harajuku. She does not attend school and appears younger than her actual age, though on occasion her expression takes on an unexpectedly adult quality. Her default demeanor is expressionless and distant; she rarely smiles and her gaze often seems cold or detached.

Her background is largely enigmatic. She is a hikikomori, a recluse who feels comfortable only within the confines of her small room—referred to as her six‑tatami space—and becomes tense or stiff when outside it. This suggests a deep‑seated anxiety about the outside world and a preference for isolation. Her motivations are not explicitly stated in the series, but she appears to be searching for something that allows her to connect with others or express herself, as hinted by the lyrics of her featured song Ghost Food.

In the narrative of Artiswitch, Lulu is a supporting character who interacts with the witch Nina and visits the mysterious shop in the back streets of Ura‑Harajuku. Her episode focuses on her inner world and the conflict between her reclusive nature and her desire for genuine connection. Over the course of her appearance, she shows subtle signs of growth as she confronts the emotions she usually keeps hidden. Her key relationship is with Nina, who uses her magic to draw out Lulu’s true feelings, though Lulu remains a largely solitary figure even after her experience.

Lulu possesses no overt supernatural abilities; her notable traits are her distinctive Lolita style, her almost unreadable expression, and the quiet intensity of her presence. Her role in the story is to represent the theme of hidden desires and the struggle between retreating from the world and reaching out to it.