Naska is a character from the third Keroro Gunsō theatrical film. She first appears as a mysterious young girl with blue-green eyes, golden hair tied in two, and a pair of white bird-like wings on her back. She is found in the ruins of Machu Picchu and later becomes connected to a floating city that emerges over Tokyo. She travels alongside Fuyuki Hinata and the Keroro Platoon, who initially see her as an ally. In truth, Naska is the human disguise form of Miruru, a female Keronian who serves as a key member of the Dark Keroro Platoon. Her true form has pink body colour, a tail shaped like feathers, and clothing similar to the disguise, marked with a black-and-red inverted triangle on the forehead and outfit.

As Miruru, she possesses a sharp intellect and advanced hacking skills that rival those of Kururu. Despite her innocent-looking appearance, she shows a cold and calculating nature. For example, she forces brainwashed versions of Natsumi and Koyuki to fight each other, treating it as an experiment to understand the special bond between Keroro and Fuyuki. Her primary motivations are to support Dark Keroro’s invasion of Earth and to study the nature of the connection between the Keroro Platoon and their human friends. She acts as a support operative for Dark Keroro, using her technological abilities to aid his plans.

Naska’s role in the story is that of a secondary antagonist who initially appears helpful but later reveals her true allegiance. Her relationship with Dark Keroro is one of subordinate and ally, and she works alongside other members of his team, such as Shivava and Doruru. In terms of development, she transitions from a seemingly innocent lost girl to a capable and ruthless enemy, though her true identity as Miruru exposes her as part of a larger weapon system. Notable abilities include flight via her wings, advanced hacking and electronic warfare, and the capacity to maintain a convincing human disguise.