No. 325: A female monster. She resembles a cat with a bizarrely smiling mouth full of sharp teeth and round black eyes. Her body is small and orange. Characteristic: If you make eye contact and don't mimic her, she cuts your head off. Why did she appear at a school? Weakness: Her field of vision (you can block it by stepping on things). She wants to play a lot. Her song: "When we make eye contact~ if you don't follow along~ your head! (Your head...?) Snip-snip, chop-chop!" Excludes other monsters.

No. 182: Appears female and is a monster. She is made of lava and seems to have become this way after being bullied for being lava in the past. She has a smiling, melting mouth. She turns the entire floor into lava. She wants to play together. Weakness: Cooling. Her song: "Let's play together... inside the lava! (Hehehe!) Let's melt together~ since we'll be eternal friends..." Why did she appear at an orphanage of all places? Excludes other monsters.

No. 102: A male monster. He is shaped like a teddy bear; one eye is a button and the other is a hollow hole. He loves hugging and uses a sort of hypnosis through his eyes to lure people to him. He has a teddy bear body with spring-like arms and wears a torn navy blue bowtie. His face and mouth are sewn shut. He thinks of himself as a cute teddy bear and just wants to hug people, but if you're caught, you become a doll "forever." His song: "Hug me! Become my doll! I love hugging the most! You'll only look at me forever... right? Right? Right-right-right?" Why did he appear at an amusement park? Weakness: The head. Excludes other monsters.

No. 476: A male monster. He looks like black slime and splits into two every 5 minutes. Weakness: If the space is narrow, he bursts, leaving only the main body. He also resembles paper clay. He has a white mouth that smiles limply and red eyes. His song: "In 5 minutes, I'll split in two! Hehehehe! In 5 minutes, we'll cover the world." Why did he appear at a museum? Excludes other monsters.

Earth No. 001: The Jangsanbum (Tiger of Mt. Jangsan). It mimics human voices to eat people. It is a beast that deceives people with its voice. It is a famous Korean monster and can mimic appearances as well. It has 4 tentacles. Its song: "Lend me your voice, I shall lure your precious one... he shall never answer... trapped in the echo." Weakness: Ultra-high frequencies. What is its connection to the Dimensional Portal Monster? Excludes other monsters.

Earth No. 007: A female wearing a red mask. She carries large scissors and has a torn mouth that is sewn shut. She has long hair and asks people, "Am I pretty?" If you say no, you die; if you say yes, she says she'll make you just as pretty and rips your mouth. Her song: "Am I pretty? Tell me I'm pretty. Am I pretty? Tell me I'm pretty! I'll rip your mouth too, just like mine~" She is extremely fast. Weakness: Electric current. But why does she rip mouths? Excludes other monsters.

No. 204: Genderless and loves hide-and-seek. The positions of its eyes and mouth are irregular, and it has rabbit-like ears. It's a monster inspired by Mecha-Chameleon. It eats people from behind to create clones. Weakness: Loud noises. It has many eyes and mouths all over its body. Its song: "I'm here! You couldn't find me, right? Hehehe! I'm right here, you can't find me! Right behind you! Your eyes, your pancreas~ even your shadow. I'll take it all..." Excludes other monsters.

Mero White: Male with white skin. A member of the Yaya tribe with bangs. He has cat-like ears, is kind, and is an 'F' type. He's surprisingly smart. He has white pupils with a white plus (+) shape and always has his tongue sticking out. He is a hunter. Likes: Hunters, candy. Dislikes: Wolves, foxes, monsters. Mero Black: Male with brown skin. A member of the Yaya tribe with bangs. He has cat ears and is a tsundere. He's a total 'T' type and the opposite of White. He feels like White's twin. He has black pupils with a white minus (-) shape. He also sticks his tongue out but speaks quite nicely. He has cat ears! He is NOT a twin! Likes: Hunters, chocolate. Dislikes: Monsters, foxes, wolves. Violet: Female with purple skin. She covers her mouth with a purple sweater and communicates through body language. One eye is covered by her bangs. She has purple pupils with a division (÷) shape. She is a hunter. Likes: Hunters, soft things. Dislikes: Foxes, wolves, monsters. Pink: Female and adorable. She admires Mero Black and is a huge fan. She is Mint's twin and has pink skin and eyes with a '>' shape in the pupils. Together with Mint, she summons the Romantic Bazooka to handle things. Likes: Mint, Romantic Bazooka, Mero Black, hunters. Dislikes: Foxes, wolves, monsters. Mint: Male and adorable. He is Pink's twin and admires Mero White. Together with Pink, he summons the Romantic Bazooka. He is a boy. Doctor: Male and a scientist. He seems to have a connection with the Portal Monster. He usually speaks through a doll but occasionally talks directly. He created the Portal Monster Translator. Mero Yellow: Female and kind. Very beautiful and loves music. Not much else is known yet.