Kuuta, a petite white-furred monkey with bright blue eyes and a rounded tail, sports a vibrant yellow handkerchief around his neck. Gifted to Natalie by the Professor in her childhood, he grew into her inseparable companion, embodying playful curiosity and a knack for wandering without malice. His tranquil existence shatters during a storm when Pipotron J, a robotic enforcer, forces an experimental Peak Point Helmet onto him. The unstable device transforms Kuuta into Specter—a cunning, malevolent intelligence that becomes the series’ central foe. Unaware of his identity, Natalie mourns Kuuta’s disappearance while battling Specter’s schemes.

The prolonged conflict shifts when Specter, moved by the heroes’ empathy toward monkeys, sacrifices himself to save Spike from Pipotron J. Shedding the helmet, he reverts to Kuuta, reuniting with Natalie. Though restored to his gentle, injury-prone self—reliant on climbing and exploration over strength—his story evolves in the anime’s second season. There, Kuuta temporarily hosts Specter, now an independent entity wielding full power. Throughout his journey, Kuuta’s loyalty and innocence anchor his bond with Natalie, steering his choices to shield her from distress, even amid chaos.