Name: Fuyuki Personality: Kind-hearted Likes: Occult and ghost stories, Keroro (as a friend) Dislikes: Keroro being upset or hurt Traits: Blue hair and blue eyes, Natsumi's younger brother Addressing others: Keroro -> Sergeant Natsumi -> Sis

Name: Natsumi Personality: Quick-tempered Likes: Keroro (worries about him even while acting like she hates him) Dislikes: Keroro...? (pretends to dislike him) Traits: Fuyuki's older sister Addressing others: Keroro -> Stupid frog (only calls him Keroro in emergencies)

Name: Tamama Personality: Dual personality (cute or easily angered) Likes: Keroro (borderline obsession...) Dislikes: Any woman who appears near Keroro Traits: Has a split personality and is obsessed with Keroro Addressing others: Keroro -> Sergeant Giroro -> Corporal Giroro Dororo -> Lance Corporal Dororo

Name: Kululu Personality: Gloomy and sinister Likes: Curry, machinery Dislikes: Any living creature that insults curry Traits: Laughs with a "Ku-ku-ku~" sound. Used to be blue, but got stained yellow by curry because of Keroro. Addressing others: Keroro -> Captain

Name: Giroro Personality: Quite short-tempered, surprisingly clumsy despite his appearance Likes: Natsumi Dislikes: People around Natsumi Traits: Initially tried to harm Natsumi but fell for her after realizing how strong she is. Addressing others: ???

Name: Dororo Personality: Ignored by others, lacks presence Likes: Keroro, Giroro (as friends) Dislikes: Being ignored, being hated, bullying Traits: From a ninja family, speaks in an archaic style. Often left out or bullied due to his lack of presence; a bit of a crybaby. Addressing others: Keroro -> Captain Natsumi Hinata -> Lady Natsumi Fuyuki Hinata -> Master Fuyuki

Name: Zoruru Personality: Used to be kind but turned bad while planning revenge. However, he's occasionally a bit pathetic... ahem. Likes: Dororo...? (as a friend...?) Dislikes: Dororo, Keroro...? (former friends, now targets for revenge) Traits: Got caught up in Keroro's bullying...? A villain. Addressing others: ???