Bananyako is a supporting character who lives in a banana, distinguished by her white and pink fur. Her upper body emerges from a banana peel, and she is often depicted as fluffy in appearance. She wears a pink bow and has sparkling dark eyes with pink cheeks and whiskers.

Bananyako's personality is presented as cute and beauty-conscious. She is established as the primary female character among the group of Bananyas. Her daily interests include researching makeup and maintaining a lovely appearance. She shows a clear preference for Long-Haired Bananya, finding him most attractive, while she largely ignores Tabby Bananya who has a visible crush on her. In terms of social dynamics within the story, Bananyako serves as an object of affection for several male Bananyas, including Tabby, Mackerel Tabby, and Calico Bananya. Her role is primarily defined by her relationships with these characters and her interest in appearance and beauty.

Regarding key relationships, Bananyako has a notable connection with Long-Haired Bananya, as she shows interest only in him, though his attention tends to be focused on himself. Tabby Bananya is particularly infatuated with her, but his feelings are not returned. The main character Bananya is also interested in Bananyako, yet she does not reciprocate his attention either.

In terms of character development, Bananyako's traits remain consistent throughout the series, with no significant changes to her personality or motivations. She continues to be defined by her focus on beauty, her preference for Long-Haired Bananya, and her status as the primary female presence in the group. Regarding notable abilities, Bananyako does not possess any distinctive powers or special skills beyond the typical behaviors of a bananya, such as hiding inside her banana peel when humans approach. Her abilities are not a focal point of her character.