Sister Pchela serves as an antagonist within Regina Apis's organization, Dinasty. She possesses a short, elf-like stature, youthful features, short blue hair, and a teal pointed cap, conveying an adolescent appearance.

Initially subordinate to Sister Biene, Pchela persistently antagonizes her superior, engaging in frequent arguments and conflict. Following Biene's defeat, Pchela is promoted to lead assaults against the Papillon Soldiers, specifically targeting Papillon Rose and her allies. Her missions deploy schemes within Tokyo's Shinjuku Kabukichō district, focusing on locations tied to sexual energy exploitation like the Image Club.

Pchela masterminds technological deceptions: mass-producing counterfeit schoolgirl underwear to entrap victims and creating a Papillon Rose doppelgänger to sow distrust. She captures Papillon Margarette (Shizuku) and orchestrates attacks using mind-controlled proxies, including sakura drones.

A significant turning point occurs when Pchela defects from Dinasty after witnessing Regina Apis's cruelty. Fragmented memories surface, revealing her true identity as the reincarnation of Papillon Dahlia, a former soldier who rebelled against Dinasty and was sealed away. This latent identity fully awakens during a battle against the Papillon Soldiers and an attack by Dinasty's elite guard, the Alveare, culminating in her transformation back into Papillon Dahlia.

Restored as Papillon Dahlia, she allies with the Papillon Soldiers. With her dying breath, she discloses critical intelligence: Dinasty's stronghold at G Point and the imprisoned Queen Flora. This information directly enables the Papillon Soldiers' final assault on Dinasty's headquarters.

Pchela's trajectory spans from minor antagonistic minion to a pivotal figure whose hidden past and sacrificial redemption profoundly influence the conflict against Regina Apis.