Unlike his best friend Hachiware who speaks well, Chiikawa communicates only through exclamations and cries like "Waah...", "Fueee...", "Hiiiik...", and "Hwaaang...". Instead of speaking, he vividly conveys all emotions through rich facial expressions, such as drooping ears or tearing up. He can only say very simple words. He is very timid, getting startled by small noises and crying when something sad happens. However, when his friends are captured by monsters or in danger, he shows incredible courage by being the first to grab his sasumata (extermination pole) and charge at the monster, even while crying from fear. He once won a housing lottery for a yogurt prize with extremely low odds, making him the only one of the trio to own a proper detached house. On the other hand, he lacks academic talent and once cried after failing the Level 5 Weeding Certification exam that he prepared for with Hachiware. He sleeps hugging a teddy bear and treasures his pink bear pochette. He has white fur and resembles a hamster. A Chiikawa.

Unlike Usagi who can't speak and Chiikawa who barely does, he is the only one of the trio who speaks fluently. He perfectly understands Chiikawa's cries and Usagi's strange noises and interprets them for other friends. He lives alone in a cave where monsters might appear. He is poor enough to keep using a cracked cup and eat using a broken bowl as a table, but he is the most romantic and resourceful character, saving money to buy a camera and a guitar. No matter the situation, he encourages his friends with his characteristic bright personality and positive words. When he was the only one to pass the certification exam he took with Chiikawa, he was so considerate and warm-hearted that he secretly shed tears, worrying that the failed Chiikawa would be sad. He has a middle part in his fur. The parted area is blue, and the rest of his fur is white. He resembles a tuxedo cat. A Chiikawa.

He has a very eccentric and 'my way' personality, acting as a mood maker who suddenly surprises or pranks Chiikawa and Hachiware. Unlike Chiikawa who has a house or Hachiware who lives in a cave, it is completely unknown where he eats and sleeps. He is the only one of the trio to hold the high-level 'Level 3 Weeding Certification' and is very smart, even self-studying a foreign language (Goblin) to act as an interpreter. Unlike his friends who get scared when monsters appear, he suppresses them by flashily wielding a 'staff' type weapon that lights up. While he usually seems to be teasing his friends, he is the most loyal and reliable ally who saves Chiikawa or Hachiware first with his brilliant physical abilities and brain when they are in danger. He absolutely cannot speak. Instead, he uses sounds like "Uwaa" (Delicious), "Purururu" (Excited), "Yaha!", "Haa?" (Why?/What?), "Jururi" (Slurp/Hungry), "Urararara!!" (Wow! Feels good!), and "Hoa?!" (Yikes?!). He has yellow fur and can eat spicy food better than his friends. He resembles a yellow rabbit. He helps sincerely when needed. A Chiikawa.

The No. 1 ranked exterminator who slays monsters. Even the Armor-sans cannot treat him lightly, and his sword is engraved with the 'Chiikawa Mark' that only the strong can possess. He serves as a spiritual pillar, taking Chiikawa and Hachiware under his wing as disciples, giving them special training and passing on extermination tips. He seems like a heartless veteran warrior, but he actually loves sweet desserts and cafes. He has a gap-moe charm where his usual stern expression crumbles and his eyes sparkle after taking a bite of dessert. As a highly skilled individual, he is a very high earner in this world. He drives his own car, which other residents couldn't even imagine, and coolly buys delicious meals and desserts for his disciples. He has yellow fur. A sea otter Chiikawa.

There are several types, such as the kind 'Pochette Armor' who gives out jobs, provides money, and makes/sells bags and pajamas, and the 'Ramen Armor' who is the owner of a popular ramen shop. They act as guardians by buying food for residents or making toys for them. The Leader Armor-san warns, "Don't get too close to the residents." In fact, they also serve as a surveillance bureau that knows the secret of residents turning into monsters and controls them.

He looks cute but is selfish, greedy, and steals others' food. He constantly demands those around him to "Adore me!" and ignores the real Momonga who asks for his body back. He hates labor, but because of his experience from his monster days, he can fly and shows incredible physical ability and unexpected combat power. A Chiikawa...?