Bananya is the central character of the anime Bananya At Home Party, which serves as a tenth-anniversary special for the Bananya franchise. This character is a small, white cat that lives inside a banana, a concept that defines the visual identity and whimsical nature of the series. Bananya's background is rooted in a gentle and imaginative premise where cats and bananas fuse into a single, adorable creature. In the story of Bananya At Home Party, the narrative follows a kitten that wakes up in an unfamiliar world populated entirely by Bananya creatures and soon realizes that it has transformed into one itself. Bananya is the embodiment of this world and serves as the guide and companion within this strange new environment.

In terms of personality, Bananya is consistently portrayed as optimistic and carefree. This character approaches life with a lighthearted and cheerful demeanor, never showing signs of anxiety or negativity. Bananya is curious about its surroundings and playful by nature, often engaging in activities that reflect a cat's typical behavior, such as exploring, chasing small objects, and showing interest in food. Bananya has a particular fondness for sweet treats, which ties into its primary motivation and lifelong dream: to become a trendy chocolate-covered banana. This aspiration is not driven by ambition in a conventional sense but rather by a simple, childlike desire for enjoyment and fulfillment.

Bananya's role in Bananya At Home Party is that of a protagonist who facilitates the journey into its own world. The character does not drive a complex plot but instead leads the viewer through a series of gentle, slice-of-life adventures. Together with other Bananya characters, including Tall Bananya, Chibi Bananya, Stray Bananya, and Baby Sweet, Bananya sets off on a journey across forests and mountains to find a lost shiny treasure belonging to a little one. This quest gives the character a purpose within the special while maintaining the easygoing, low-stakes tone of the series.

Key relationships in the story revolve around the other Bananya variants, each of which has a distinct appearance and personality. Tall Bananya is larger and more composed, Chibi Bananya is small and cute, Stray Bananya has a more rugged look, and Baby Sweet is endearing and tiny. Bananya interacts with these characters as friends and companions, and the group dynamic is one of cooperation and mutual support. The special also introduces supporting characters such as Sheriff Bananya and Zombie Bananya, who add variety and mild humor to the world.

Bananya shows little to no development in the sense of a character arc or personal growth, as the franchise is designed for very young audiences and relies on consistency rather than change. Bananya remains optimistic, playful, and sweet-natured from beginning to end. The character's development is more about reinforcing its core traits than evolving beyond them. This stability is part of the character's charm and appeal.

Notable abilities include Bananya's capacity to live inside a banana peel, which provides both shelter and a distinctive mode of movement. Bananya can roll, hop, and slide while enclosed in the banana, and can emerge from the peel to interact with the world. Bananya also demonstrates typical cat behaviors such as hunting instincts, but these are presented in a harmless and amusing way rather than as actual predatory actions. Beyond these physical quirks, Bananya's primary ability is its power to spread comfort and cheer through its mere presence. The character's gentle and carefree nature serves as a calming influence, making Bananya a soothing and enjoyable figure within the gentle, iyashikei-style atmosphere of the special.