This unnamed character, referred to as "Girl with Glasses" (メガネ娘, "Meganekko"), appears sporadically throughout the series solely as a background figure. She is consistently depicted lurking around corners or hiding in the background, intently observing the protagonist Mayu Morita.

Her primary focus is Mayu, prompting repeated attempts to surprise her through sudden appearances or unconventional actions. These attempts consistently fail, resulting in comedic outcomes. The motivations for her persistent efforts to startle Mayu remain unexplained.

No backstory, personal history, or character development is provided for her within the manga, OVA, or television series. Other characters do not formally acknowledge or interact with her, maintaining her role as an enigmatic observer. The series does not explore her relationships, family, or any evolution beyond these recurring comedic attempts.

Her presence remains confined to brief, non-speaking cameos focused on her failed engagements with Mayu. No expanded roles, alternate portrayals, or additional dimensions exist in any official extensions of the franchise.