Belle is one of the two selectable main protagonists in a popular urban fantasy action RPG. She runs a retro video store called Random Play as a cover, while secretly operating as the legendary "Phaethon" Proxy. The Proxy role involves guiding Agents through the Hollows, dangerous pocket dimensions filled with powerful threats. The name Phaethon refers to her underground reputation and legendary status among the Agents she works with. Her double life and calm, capable personality have made her one of the most beloved characters in the game's community.

Belle and Wise are siblings who serve as the two playable protagonist options in the game. Players choose one at the start of their journey, with the other appearing as an NPC throughout the story. Belle is the younger sister and Wise is the older brother. Both share the same background, story role, and Phaethon Proxy identity. The main difference is cosmetic and narrative preference. Belle has become the more popular choice among players due to her design and personality, which has fueled significant community interest in belle plush figures and fan merchandise.

Belle is classified as a non-combat protagonist, meaning she does not participate directly in battles the way regular Agents do. Instead, she plays the role of the player's avatar and guide throughout the main story. However, this has not diminished her popularity. In fact, the community has been actively discussing and anticipating any future updates that might give Belle a more active combat role. Her story presence and personality make her one of the most talked about characters in the game's community, which is reflected in the strong demand for a quality phaethon plush or belle plush collectible.

Belle has consistently trended since the game's global launch due to her unique character concept, stylish design, and the mystery surrounding her double life as a video store owner and underground Proxy. As the game expands its story content and introduces new chapters, Belle's role has continued to grow, reigniting community discussions and fan content. Fans have also been creating and sharing fan art, cosplay, and merchandise inspired by her, including searches for belle plush and proxy plush collectibles. Her status as the iconic face of the game keeps her consistently relevant in gaming circles.

In the game's lore, Hollows are dangerous dimensional anomalies that appear within the city, filled with corrupted creatures and warped environments. Only trained Agents and a few skilled individuals dare to enter them. The Phaethon Proxy, the identity Belle uses secretly, is a legendary guide who assists Agents in navigating these Hollows safely and completing their missions. It is a high-risk, high-stakes role that operates outside official channels, making Belle a figure of mystery and respect in the underground community. This compelling lore background is a big reason why the phaethon plush has become such a sought-after collectible for fans of the series.