Natsu, alternatively called Nuts, is a prince from the Palmier Kingdom. In his fairy form, he resembles a squirrel and works diligently as a clerk at Natts House jewelry store, frequently ending sentences with "~natts." Initially trapped within the Dream Collet, his release requires the Pretty Cure duo's intervention using their powers.

He exhibits a solemn, cautious personality, contrasting sharply with his carefree companion Coco. This guardedness stems from past trauma, fostering reluctance to form new bonds or express vulnerability. Preferring self-reliance, he faces challenges alone. Communication adheres strictly to honesty, avoiding deceit or insincerity. This commitment complicates apologies or expressing non-genuine sentiments due to unorthodox logic. Profound remorse follows actions causing unintended emotional distress, prompting earnest efforts to make amends.

Natsu possesses the capability to transform into human forms designed to provide adult perspectives advising the five-girl team, though these forms lack heroic capabilities and are portrayed as "weaklings."

His appearances span multiple official media:
* **Anime**: *Yes! Pretty Cure 5* and *Yes! Pretty Cure 5 GoGo!*, plus films *A Movie of Support from Pretty Cure to Everyone!*, *Yes! Pretty Cure 5 Movie: Great Miraculous Adventure in the Mirror Country!*, *Yes! Pretty Cure 5 GoGo! Movie: Happy Birthday in the Sweets Kingdom*, and ensemble films like *Pretty Cure All Stars Movie DX: Everyone is Friends☆A Great Gathering of All Miracles!*.
* **Manga**: Adaptations of *Yes! Pretty Cure 5* and *Yes! Pretty Cure 5 GoGo!*.
* **Video Games**: *Yes! Pretty Cure 5* and *Yes! Pretty Cure 5 Go Go: Let's Go Together!*.

Trivia notes include being the only mascot across *Yes! 5* and *GoGo!* without a human-form surname, possessing the smallest ears but largest tail among franchise mascots, and sharing a voice actor with a supporting character from *Futari wa Pretty Cure Splash Star*.