Sharuru hails from the Trump Kingdom as one of four primary fairy mascots assigned to recruit partners who become legendary warriors opposing invasions. She meets Aida Mana during a Jikochuu assault at Clover Tower, identifying Mana's potential and granting her the Lovely Commune device to transform into Cure Heart. Their alliance anchors her purpose across the narrative.

Physically, she manifests as a pearl pink rabbit with a large fluffy tail, displaying hot pink heart markings on her ears and wing-like pink lashes encircling her eyes. Her attire includes a floral-patterned pink collar and an oversized bow featuring heart-shaped accents around a heart medallion. When adopting human form, she mimics a middle-school-aged girl resembling Mana by choice, preserving her tail and cat-like ears.

Her demeanor blends passion, diligence, and excitability, punctuating speech with her signature "~sharu" suffix. She exhibits fierce devotion to Mana and their mission, often aiding school tasks in human form—such as document organization or deliveries—while occasionally revealing irritability through raised frustration-fueled outbursts. Her unwavering dedication mirrors Mana’s own tireless ethic.

Crucially, she enables the warrior team’s expansion beyond Cure Heart. She guides Rikka Hishikawa’s transformation into Cure Diamond, offering emotional reinforcement in early skirmishes. Alongside fellow fairies Raquel and Lance, she hunts for the vanished Princess Marie Ange and coordinates countermeasures against foes like the Selfish Trio, leveraging reconnaissance skills and morale-boosting during conflicts.

A pivotal evolution grants Sharuru human transformation capacity, mainly to bolster Mana’s student council tasks with heightened physical efficiency, including inventory management. Training segments depict initial struggles with human objects before proficiency. While her teapot form is confirmed, the complete scope of her transformative abilities remains undefined.

Relationships shape her journey: beyond her foundational trust-fueled bond with Mana, she navigates dynamics with fellow fairies—deferring to elder Raquel while sporadically clashing with youngest Lance. Collaborative scenes show joint efforts to locate the princess or thwart enemies. Her human-form episode underscores a yearning for bonds transcending battlefield exigencies.

In the non-serial movie, Sharuru features alongside the team without distinct plot-centric deeds in documented sources. Adaptations like the English dub preserve her core attributes, though her human-transformation episodes were excised barring a finale glimpse.