Tamama is the newest and youngest member of the Keroro Platoon, serving as a private second class. His name comes from the Japanese word for tadpole, which fits his amphibious design. Voice actress Etsuko Kozakura has described him as 19 years old, though his actual age remains vague in the series.
What really defines Tamama is his wildly unstable temperament. He's usually sweet and upbeat, but can flip into an absolutely unhinged, vengeful version of himself—often triggered by something minor and always accompanied by a balloon-popping sound effect. Fans often note this mirrors his occasional partner Momoka Nishizawa's own mood swings. His biggest trigger? Anyone getting too close to Keroro, his commanding officer and the person he's fiercely devoted to. He's especially bitter about Angol Mois, whom he dismissively refers to as "that woman" and sees as direct competition for Keroro's attention. The irony is that Mois seems completely oblivious to how much he despises her.
Beyond his jealous streak, Tamama has pretty stereotypical frog-soldier hobbies. He's obsessed with junk food—candy, cake, soda, potato chips, the works—and takes physical training seriously enough to maintain his own private gym in the Nishizawa Mansion. The anime actually has him get flagged for high blood sugar during a medical checkup because of his sweet tooth. One random detail: nails on a chalkboard genuinely bothers him more than almost anything else.
Content compiled by AnimeList.moe from publicly available sources.