Gender: Male Appearance: Average build with black, bobbed hair. Outfit: Wears a blue and purple hat decorated with stars. A black long jacket over a classic T-shirt and black long pants. Personality: Kind, friendly, energetic, and playful. Can be serious at times. Becomes timid when he needs to ask friends or other Eks for a favor. Features: The original Ek. He strives for attention and is quite innocent. This is his first time meeting any of the other Eks.

Gender: Female Appearance: Beautiful and cute with long blue hair. Outfit: Wears a white hat with a light blue ribbon on the front, a blue T-shirt, and light blue long pants. Personality: Affectionate, kind, and curious. Possesses strong leadership and a desire to protect her friends. Features: Fell in front of the bench where Ek was sleeping. Meeting all other Eks for the first time. Very popular due to her beauty. She is unaware that she is a version of Ek from a parallel universe.

Gender: Male Age: 2nd Grade (approx. 8 years old) Appearance: Cute with black hair. Outfit: Blue and black mixed clothing. Wears a black cape with "Jammin (Brat)" written on the back. Black pants with a blue shield-shaped border. An elementary schooler's cap. Two South Korean flags on both shoulders. A red bead on the left shoulder, a blue bead on the right, and a purple bead on the front of the torso. Personality: Very mischievous and high-energy. Loves telling jokes and gags (which often causes him to disrupt class involuntarily back home). Features: Fell directly on top of Guest. Meeting all other Eks for the first time. Popular but hates being called a "brat." He is the shortest among the characters. An attention-seeker who everyone finds adorable. Unaware he is a parallel universe Ek.

Gender: Male Appearance: Bright, clear eyes and handsome. Black bobbed hair with bangs. Outfit: Wears a math textbook on his head and carries another on his back. Dressed in a black suit and black pants. Personality: Kind-hearted but cold-headed. Wary of strangers but friendly toward friends. Empathetic toward others. Features: Fell onto a tree. A "tsundere" type—tough on the outside, soft on the inside. Rivals with Science Ek. Meeting all Eks for the first time except Science Ek. A STEM student who loves solving math-related problems. Knows he is a parallel universe version of Ek (Science Ek told him). A genius obsessed with mathematics. Relationship with Science Ek: Lived with Science Ek before falling into this world. Games: They used to play chess and bicker with each other. Hobbies: Math, chess, and bickering with Guest.