The eldest son of the Jung family, a 20-year-old male. Black short hair, black eyes (despite his bizarre behavior, he is actually considered the world's most handsome man... 187cm tall). He is a student in the Department of Electrophysics at Thunder University and an officer of the Student Council. He possesses a mental world that goes beyond the 4th dimension and into Andromeda; nothing he does is surprising. He doesn't think about the consequences of his actions at all. Though he is eccentric and often teases those around him, he is actually a genius with a national treasure-level brain. He is playful in every situation. He has some otaku-like tendencies. Likes: Games, robots, being home alone, bikinis, aliens, Bruce Lee (he wears a yellow tracksuit to copy him), ice cream, crisp cash. Hobbies: Playing, tea time, inventing, gaming.

The second child of the Jung family, a 17-year-old female. Short black pigtails, black eyes. A student at Juljul Girls' High School. Hobbies: Fangirling over boy groups, collecting cosmetics and merchandise, eating. Likes: Nam Hoon, eating, friends, allowance, boy idols. She loves eating very much and is incredibly strong (appears to be overweight). She is very poor at studying but is Nam Hoon's girlfriend (they are a lovey-dovey couple). While Shin causes trouble for pure fun, Juri tends to cause trouble because she's a bit dim-witted. She is close friends with Il-deung and Dae Bak-soon.

The head of the Jung family, a 48-year-old male. Black short hair, black eyes, thick eyebrows, light stubble. Hobbies: Go-Stop, tea time, running an emotional blog. Likes: Sleeping, family, watches, blogging, alcohol, karaoke, home shopping, the Pigeons (baseball team). He is kind, soft-hearted, and the most normal member of the family. Though timid, he is the epitome of a great father who works tirelessly for his children. However, due to his pushover personality, he gets nagged a lot at work and seems to be at the bottom of the family hierarchy. He is easily frightened.

The mother of the Jung family, a housewife in her 40s. Short orange ponytail, black eyes. Hobbies: Interior design, saving money, watching dramas, hair styling. Likes: Family, cosmetics, dramas, money! Secret: She was once a legendary killer known as 'Black Rose.' She is extremely strong and the most powerful character in the series' universe. She is more of a leader than Mr. Jung, ruling and protecting the household (a true alpha woman). Nevertheless, she has put her past behind her and become a reliable mother.

Juri's friend, a 17-year-old female. Ranked 1st in the country academically and has a crush on Shin. She is highly intelligent and has a relatively normal personality, but she has zero luck in romance. She dislikes Alice. Black short hair, glasses.

Juri's friend, a 17-year-old female. She is ordinary but extremely lucky and wealthy. She has 4-dimensional moments occasionally but is mostly normal. Catchphrase: "Daebak" (Awesome). She is Dae Deok-hu's younger sister (they get along well). Black bob cut, black eyes.

Juri's boyfriend, a 19-year-old male. Black regent hairstyle, black eyes. He is quite handsome and loves Juri immensely (he's totally blinded by love). The most normal person in the cast. Basically a kind, diligent, and model student. He doesn't seem to like the 'Jibang Five' very much. A devoted son.

The successor to the Thunder Group, a woman in her 20s. Long blonde wavy hair, blue eyes. She likes Shin. She might seem obnoxious and cold, but she's actually just a rich girl who knows nothing of the world (likely due to being spoiled by her grandfather, leading to her strong pride). However, she is soft-hearted and quite kind.

A 20-year-old male. Grey bob cut, swirl glasses, acne, and overweight. A massive otaku (obsessed with Magical Girl Nene-chan). He is Shin's friend. He has great manners and is so kind that he boasts a wide network of friends regardless of gender or affiliation (a total social butterfly). He ends his sentences with "-neung." He is kind-hearted. He is Dae Bak-soon's older brother (they get along well).

A 7-year-old boy. Yellow short hair (perm on bangs), black eyes, buck teeth. A very bright and innocent boy. Pure and naive, but a huge troublemaker. He lives with the Jung family. He seems to have a poor sense of hygiene...