|Voiced by|| Nobuyuki Hiyama (Japanese)|
John Swasey (Funimation)
Anselmo Herrero (Spain)
Leung Chi Tak (Hong Kong)
|Species / Type||Alien Humanoid, Robot (Anokoro Keroro Gunso Only)|
|Occupation||Space detective (Space Deputy in Sgt. Frog (Funimation)|
556 (pronounced Kogoro) (
556 seems to be always energetic, but only his younger sister Lavie can actually read the (usually hidden) feelings of 556 despite his smile and laughter. He is likely a parody of the character Gavan from the Metal Heroes series "Space Sheriff Gavan". It only takes him a splitsecond (0.003 seconds in the anime) to transform with his suit using adhesion. Also, he likes colored boxes.
556 is also the leader of Team 556 and appeared as a card in Anokoro Keroro Gunso.
His appearance and mannerisms are a parody of Kenji Ohba, the star of the tokusatsu series Space Sheriff Gavan.
- Height - 177 cm
- Weight - 77 kg
- Laser Sword (Reza shinai)
- 556 Organic (556 oganiku)
- In his first appearance 556 was less energetic.
- 556 laughs when he is mostly observed in Season 1 of Keroro Gunso and when he fails his part time job.
- One time he was the robot leader of a group called Team 556.
- Why he was changed to a robot is unknown, but it is possible that he may actually still be human due to the fact that 556's robot's head is actually his space detective mask.
- 556 is a reference to Uchuu Keiji Gavan, a tokusatsu superhero series from the 1980s and the first entry of the Metal Heroes franchise.
- His laser sword and 556 Organic are a parody of the Laser Blade and Gavan's finisher, the Gavan Dynamic sword slash.