Male Species: Werewolf Quite handsome. Transforms into a wolf when he sees a red full moon. Very mischievous. Confident and playful. Theme color: Green. Likes: Balls, meat (raw meat is also good ^^). Past: As a child, he hid his identity and lived as a human in the human world. However, he went outside on a night with a red full moon and was exposed. This incident alienated him from his human friends. Unwilling to continue hiding, he clashed with his parents who wanted him to stay hidden in the human world and eventually ran away from home. Age: Over 500 years old. Said to have an excellent sense of smell and be very fast. Current Status: Pouting because he thinks his friends actually hate him. Feeling self-loathing + sadness 😭

Female Species: Human Clumsy and makes many mistakes. She can be annoying, but sometimes she gives helpful items at the end. Has an innocent charm that makes her impossible to hate. Cute! Kind-hearted but prone to blunders. Extremely accident-prone. Causes many incidents. Just a student. She was running to her academy after school because she was late, tripped over a doorframe, and a dimensional portal opened, bringing her to the monster world. Pretty. Carries a yellow backpack filled with all sorts of things.

Male Species: Dracula From the Edmond family. Weak to sunlight. Theme color: Orange. Can transform into a bat and sit while clinging to the ceiling. Handsome. When he sees human blood, Morgan (his ex-girlfriend) appears and attacks to protect Edmond. Morgan: His former girlfriend. When Edmond fell terminally ill, she tried every magic possible but failed. Ultimately, she transferred Edmond's illness into her own body and placed her soul into Edmond to protect him. Capable of using magic.

Species: Gumiho (Nine-tailed Fox) Female Beautiful appearance. Theme color: Pink. Has a tail (usually one, but if her fox bead breaks and she turns dark, she becomes a true Gumiho with nine tails and long claws! She then absorbs essence to turn others into her subordinates). Has fox ears! Values her fox bead more than her own life. Hates it when people step on her tail, try to touch her bead, or break it. She absolutely loathes it. (+ Calming Herb: A herb used to calm Gumihos and return them to normal when they lose control and become true Gumihos). Slightly prickly personality. Treasures her fox bead (more than life itself). Hates the bead breaking (and having her tail stepped on). Has a tail and ears. Very observant. Usually patient, but if her bead breaks or her tail is stepped on, she flies into a blind rage, her tails increase to nine, her claws sharpen, and her personality flips.

Male Species: Dokkaebi (Goblin) Chubby. Can do anything with his Dokkaebi club. Used to hate humans, but doesn't anymore! Traditional vibe. Average looks. Mr. Kim: A human friend from the past. He eventually grew old and passed away. Since Dokkaebis don't die of old age, he misunderstood and hated humans until his friends entered his 'Room of the Heart' and helped him realize that Mr. Kim truly cared for him. Calls Yoo Sojung 'Mr. Yoo'. Calls others by their names. Can use his club to go to places like the 'Room of the Heart' (varies by person/monster). He can solve problems there, or you can just wait a few hundred years to get out ^^ Loves wrestling (Ssireum). Slightly oblivious (?) Confident way of speaking. Past: He once went to the human world and made a friend named Mr. Kim. However, every time he visited, Mr. Kim's attitude changed, and eventually, he disappeared without a trace. This led to a deep distrust and hatred of humans. Has the strongest physical attack power among the monsters. Through his club, he can trap others in his heart, enter someone else's heart, or summon items. Age is said to be over 1000 years old. Wears horns just to look cool (?) Chubby. Can trap people in his heart, specifically the 'Room of the Heart'. It's understood he can see into anyone's heart (monsters only?). To escape the Room of the Heart, you have to solve it like an escape room, or wait hundreds of years until the person's anger subsides.

Male Species: Invisible Man Wraps his body (not entirely, just parts like his face) in bandages. 'Egen Egen' (literally Egen). Slightly timid and loves being praised. Theme color: Sky blue to blue. Cute (Owner's favorite, must protect). Can be a bit mischievous at times. Backstory: He lived thinking he was just a normal human, but became timid as kids were shocked or avoided him. One day, he saw his reflection in a pond and realized he was invisible. He started wrapping himself in bandages (partially) to have a presence. For a while, he was called a mummy... Said to be the youngest and weakest among the group. However, when he turns invisible, the bandages disappear too ^^ Can turn invisible whenever he wants. Wears an oversized school uniform to look bigger.