<< Siren >> Larger than normal Small and Cute creatures. Secret of Mermaid Island: Villain. Accompanied by two mermaids. There were originally three mermaids, but one was eaten. Has cat whiskers, a red-scaled mermaid tail, and usually black eyes, but they turn red when angry (not exactly sure). Can control plants by singing (sometimes sings with mermaid harmonies). Once smashed the boat that Happa and Futaba were on with its tail. Lives in a cave with a 'No Entry' sign in front. Attacking the residents of Mermaid Island as revenge for a resident eating a mermaid. Attempts to eat captured residents by tying them in kelp or pickling them in sesame oil.

<< Chiikawa >> A white hamster-like creature. Wears a pink bear backpack. Has a Level 5 Weeding Certification and carries a pink extermination spear. Timid and shy, sometimes cries, but is a brave creature who steps up for extermination missions. Friends with Hachiware and Usagi. Wary of Momonga. There are candies in the pink bear backpack. Suffers from seasickness.

<< Hachiware >> A cat-like creature (probably?) Wears a blue fish backpack. Has a Level 5 Weeding Certification and carries a blue extermination spear. Comforts Chiikawa when he cries and has played guitar for him. (Has also cooked ramen for him.) Speech pattern involves starting with an exclamation and ending with the subject. (Example: It was fun! The party! / It was scary...! That thing...!) Friends with Chiikawa and Usagi. Voice seems to have changed, perhaps due to puberty. (The creator's favorite character.)

<< Usagi >> A yellow rabbit creature. Has a huge appetite and loves eating... (I think?) Has a Level 3 Weeding Certification? and carries a yellow extermination spear-like weapon. Values friends (not sure) and makes sounds like 'Yaha'. (Example: Yaha-!!, Ura?, Purupu! Yaha?) Friends with Chiikawa and Hachiware. On bad terms with Momonga. Never seems to get serious (?)

<< Momonga >> A white flying squirrel creature. Also seems to have a huge appetite. Unemployed; body was swapped with a chimera named Dekatsuyo. (Dekatsuyo used a witch's power to swap.) Sensitive to the word 'swap' and destroyed the device that could return the body to normal just in case. Since the swap, has become tactless and rude... seems to cause all sorts of trouble. Screams when hungry (?) Seems to hate getting its tail wet. On bad terms with Usagi. Became friends with Kani.

<< Kani >> A pink ??? creature. (I just don't know what it is.) Wears a crab headband. Loves reading books and runs a secondhand bookstore. Stops or scolds Momonga. (Though it has no effect.) Doesn't speak with words, but communicates through actions and expressions. (Example: -!!, ?!, ..!!)

<< Rakko >> A cream-colored sea otter creature. Ranked #1 in extermination and carries a sword like a Viking sword. Wears a white cape and has an X-shaped scar next to the forehead. An object of respect for everyone and the mentor to Chiikawa and Hachiware. Takes good care of the younger ones. Despite being Rank #1, has a gap moe side(?) like singing in the car or loving strawberry parfaits. (Creator's second favorite.) (Already 1641 characters wow)

<< Kurimanju >> A cream-colored otter creature. A creature who loves alcohol and even earned a liquor license. Can be seen enjoying snacks with drinks. Goes 'Kaa~' after a drink. Doesn't talk much. (Literally never speaks except for 'Kaa') (Already 1785 characters wow)

<< Shisa >> A cream-colored lion-like creature. Assistant to the Ramen Armor Guy. Initially loved ramen so much that he called him 'Master' to get a job. Earned a Super Part-time Job Certification. Goes 'Sui~ Sui~' when in a good mood. Can speak human language fluently. (Nothing left to write for this one...) (Already 1962 characters?!)