Gabby, also called Dareo Dokono in Japanese, assists Dr. Steel. He displays low intelligence and often acts childishly, frequently preoccupied with eating. Despite this, he possesses superhuman strength and exceptional boxing skills, which he sometimes uses to resolve dangerous situations. Gabby has a notable obsession with chocolate and is easily frightened.

Physically, he is tall, bulky, and muscular with darkish tan skin, black eyes, and short black hair. His attire includes an orangish-brown T-shirt with white accents, a white undershirt, dark brown pants, and lighter brown shoes with gray soles.

Beyond combat, Gabby is a proficient driver capable of handling heavy goods vehicles, a skilled pilot, and a competent cook. He maintains a kind, friendly, and honest demeanor, showing genuine care for friends and loyalty to Dr. Steel.

In the live-action film, Gabby appears as a family friend accompanying Dr. Yamatone, Mari, and Takeru during their adventures. His involvement in the anime series concludes after episode 30, "Superpowered Cyborgs," with no subsequent appearances or further development documented in later episodes, films, or other official media.