Kururu Kululu


Kururu or Kululu, is the Sergeant Major of the Keroro platoon in the series Sgt. Frog and Keroro Gunso.

Kururu's name has been romanized as 'Kululu' in the English manga as of the eleventh volume. Furthermore, all of the books previous to this have been republished with the name replacement. (In the manga Kururu stated that Kululu is his stage name.)

Character Edit

Although he is ranked higher than Keroro, Kururu is not the leader of the Keroro platoon due to his unpleasant and unnerving demeanor, which has given him the nickname of 'Yellow Devil'. Being mostly known as a sadist, masochist, and egotistic. His blood type is AB, which fits his personality. His name comes from the Japanese word for the phrase "round and round," kurukuru , referring to the spirals seen on his glasses.

Kururu is the brains of the Keroro Platoon, officially in charge of intelligence and planning. He is also the partne

r of Mutsumi Saburo. However, he is extremely mischievous, despicable, downright evil and enigmatic, almost to the point where some people might call him a mad scientist. He was once ranked Major in the army as an intellengence officer, but was demoted for causing trouble for the 'higher-ups'. He is generally disliked by everyone, most of the characters seeing him as a depressing jerk and in the series, action figures of him tend to sell very poorly on Keron, (much to Kururu's chagrin but Kururu seems to take pride in his bad attitude). Despite this, he gets along quite well with Mutsumi (Saburo). Being the least emotional of the Keroro Platoon, he is almost never seen being moved to tears or smiling during any events, though at the same time he rarely, if ever, panics when
Kululu laugh
something goes wrong, likely due to the multiple dangers from his own inventions outweighing it. It is however shown that he really is actually a good person who cares for his friends, he just like practical jokes and often takes them too far. While many times in the anime and manga the platoon have talked about perverted things they condone it and say they don't actually do it. Kururu usually uses Giroro for his experiments, mainly because of their differences. Kururu loves curry, but often takes this to the extreme, even seen bathing in it, and can withstand even the spiciest curries. He is often seen holding a plate of curry or loudly eating it, although once the narrarator called it spaghetti.

Kururu also seems to be a skilled DJ. He is seen in a few episodes using turntables (one time in front of a large crowd).

Along with the other members of the Keroro Platoon, Kururu is afraid of the Butt Firecracker.


Kururu is a yellow adult Keronian with a small yellow spiral symbol on his orange cap and a red spiral on his chest. His headphones are a multipurpose gadget. When Kururu was a young child, him and his hat were orginally blue, but he was dyed yellow after falling into a huge plate of curry created by the Kero Ball. His stomach has a red spiral mark on it; a yellow one is also located on his hat. Spirals can also be seen on his glasses. When these glasses are removed in one way or another, Kururu often begins to mumble "glasses, glasses" (megane, megane) and starts searching for his glasses. His afro was first seen dark orange but later, and more often, seen as purple.


  • Saburo - During their somewhat violent first meeting, Kururu was saved by Saburo. They bonded after the mishap and became partners, both of them being misunderstood geniuses. Despite his faults, he gets along quite well with Mutsumi and even views him as a friend and ally.
  • Angol Mois - Kururu has stated that he dislikes people with pure hearts. This has caused him to fear Mois during several moments when she stares at him intently with her pure eyes. Though she's not particularly frightening, she does show behaviors that intimidate the Sergeant Major. Otherwise, the two are often seen together, either working in the lab, or teaming up on missions.
  • Giroro - Kururu and Giroro despise one another, and Kururu takes pleasure in using him as his test subject. By Season 3 however, Kururu seems to have developed a slight crush on Giroro, much to the Corporal's abject horror, blushing whenever Giroro pays extra attention to him, and wasting no opportunity to woo Giroro by way of gift or twisted invention. Whether this affection is genuine or just another way for Kururu to freak Giroro out has not been made clear.
  • Aki- Kururu has been shown to have a bit of a perversive crush on Aki. He is seen monitoring her on several occasions (even in the shower), and has built an entire battle robot that is the EXACT replica of her. (Counting every little detail) says Kururu in the anime by Funimation.
  • Rinono and Shupepe - Kururu's siblings, who premier in Chibi Kero: Secret of the Kero Ball!? as they walked back home with Kururu when he found the Kero Ball. The two tadpoles leave him shortly after finding the Kero Ball to go home without him.
  • Tororo- Kururu and Tororo were rivals before Kururu arrived on Pekopon. Tororo has apparently been causing trouble for Kururu since they where in military school together. In the manga, Tororo continues to occasionally hack in to Kururu's computer and cause problems for Kururu and the Keroro platoon.

Costumes and transformationsEdit


In some episodes, Kururu disguises himself as a magical girl complete with short, orange hair, a uniform, a wand and wings. Kururu became Keroro's guide in Hinamatsuri. He also became a contestant for 623's radio contestant, in which he won, by doing confusing math while telling cold jokes. In another episode, he became a very popular idol under the name Kururuko Tsukishima, and later suddenly quits and disappears right before a big stage performance for the despair of Keroro, who is acting as his manager.


After turning himself into a baby using his age-altering gun which broke soon after, Kururu was seemingly stuck in this infantile state. This caused much trouble for everyone, the Hinatas take care of him while the platoon look for blueprints. However, when a very affectionate Angol Mois puts him up against the terrifying idea of being raised by someone as pure and innocent as her, he quickly fixed the gun, apparently retaining his genius even as a baby, and turned back to normal.

Old Lady

Kururu disguises himself as a little old lady as a diversion for Fuyuki and Momoka's teacher. The teacher has to carry Kururu on his back.

Pekopon suit

Keroro gives the Keroro Platoon an order to find the wanted criminal #303, Kururu dresses up as cop wearing a brown hat and matching trenchcoat.


Kururu dons this attire in order to attend a Halloween party in the 133rd episode of the anime.

Dragon Kururu

During the fourth movie, Shion captured Kururu and turned him into a dragon. In this form, he is a yellow dragon with metallic blue wings. He loses the glasses in this form, revealing yellow green eyes. On his chest is a warped spiral symbol, and his headset has cords protruding from them, allowing him to utilize electrokinesis. But as of episode 356-A "Keroro platoon, real Dragon Warriors" his eyes were shown to be a yellow green though the whole episode again, with the back side of his wings being yellow with his body.


  • Kururu also has a habit of eating watermelon very quickly and loudly.
  • When Kururu is dizzy, the spirals on his glasses swirl round and round.
  • He has the most realistic Pekoponian disguise.
  • Kururu loves to eat curry.
  • His rank is Sergeant major.
  • In Movie 5, after Kururu gets swallowed by AkuAku, he actually cries and shows emotion some what resembling Dororo in his trauma mode and blames himself for everything that has happened even though it`s not his complete fault.
  • Not only is Kururu obsessed with curry, but he also seems to have a talent for cooking it.
  • In the Funmation Version in episode 68, Kururu states he is an honorary Timelord.
  • Kururu is shown eating random foods such as spagehtti or curry at odd, inappropriate times (Once pointed out by the narrator in episode 57 in the Funimation version)
  • Kururu`s ear accessory is an multipurpose gadgets that can be used to remove the memory(which seems like it has no effect to kururu.)and boosts the computers and help display the screen.
  • Kururu gets serious/mad when the computers are getting hacked. (Mostly by Tororo)
  • When Kururu is serious/mad his voice change and he types faster than the normal times and become evil at the person who is hacking the computer.
  • Kururu is rarely seen eating curry in the first season.
  • Kururu made the kururu robo before making the keroro robo
  • Kururu`s lab is known for the most kitchen like area in their base
  • Kururu is considered a suspect when keroro does not know what really happened
  • Kururu has taken off his glasses in episode 313 part b, but he was turned around
  • Kururu has cried very few times. He once cried in episode 313-b after seeing his mother
  • He is a DJ
  • One of Kururu's eyes are shown once in the manga but they are closed like puckered up lips {they look like this(3)} in Volume 3: Chapter 22, page 16
  • Kururu calls himself "Ore" or "Ore sama" in the anime, "Ore" it's self being a arrogant way to say "I; Me" the add on of calling him self "Sama" makes it more arrogant.
  • Kururu can play the recorder


Kururu's name comes from the japanese word 'kurukuru' meaning "round and round." Explaining why his resonance goes "round and round" since he says "kurukuru"

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