Moyai appears in the anime, directly inspired by the real statue situated near Shibuya Station. Like its real-world counterpart, a popular gathering location, this character acts as a meeting point within the story.

Physically, Moyai takes the form of a stylized head featuring dreadlock-like hair, mirroring the design of the actual stone monument. This monument was gifted by Niijima Island to mark the centenary of its administrative transfer to Tokyo. The character possesses two distinct faces, consistent with the real statue's second face located on its rear.

The name "Moyai" derives from the Niijima Island term signifying mutual assistance or collective effort. This concept of cooperation and community support shapes the character's thematic essence.

Moyai exists within the setting as a silent observer, embodying the historical and communal spirit tied to its location. Its presence contributes to the backdrop of daily life in Shibuya, without engaging in dialogue or direct action.