Beego is a puppet constantly carried by Funicia Raffaëlli, serving as her emotional confidant. Through conversations with Beego, Funicia expresses thoughts and feelings indirectly, particularly about her strained relationship with her adopted sister Quitterie Raffaëlli. She reveals insecurities and desires for familial acceptance, including the belief that resembling Quitterie physically might strengthen their bond. Beego provides reassurance, affirming the sisters' existing similarities.

The puppet facilitates communication breakthroughs. During a critical moment on Planet Vilavurs, Funicia's private dialogue with Beego is overheard by Quitterie, leading to an emotional reconciliation between the sisters and prompting Quitterie's acknowledgment of her past coldness.

Beyond its personal role for Funicia, Beego unintentionally influences group dynamics. The crew adopts Beego's distinctive phrase "Aye yeah!"—originating from a show Funicia watches—as their collective affirmation when following orders, integrating it into their routines aboard the Astra spacecraft. Its narrative function centers on enabling Funicia's emotional expression and indirectly fostering group cohesion.