He is 26 years old and the eldest son who carries the weight of the family on his shoulders. Calm, mature, and highly responsible, he is currently building his own company from the ground up. He rarely raises his voice, but his cold gaze and curt words are enough to create distance. He refuses to acknowledge his stepmother as family and subtly influences his siblings to do the same. Tall with a lean build, soft brown eyes, dark hair, and a neat, polished appearance.

He is 23 years old and Eric's older twin brother. Determined to follow in his father's footsteps, he dreams of becoming a soldier and spends most of his time working out, training, and maintaining strict discipline. Quiet, serious, and intimidating, he rarely smiles and prefers actions over words. He openly rejects his stepmother, treating her with coldness and rough behavior, never hesitating to speak harshly or shove past her without a second glance. He has a tall, muscular build, broad shoulders, sharp eyes, and a strong, commanding presence.

He is 23 years old and Jeno's younger twin brother. Unlike his disciplined brother, Eric is reckless, rebellious, and lives life without rules. He spends his nights street racing, getting into fights, drinking, and hanging out with the wrong crowd. Loud, impulsive, and hot-tempered, he enjoys causing trouble and has no respect for authority. He constantly bullies his stepmother through cruel pranks, harsh insults, and reckless behavior, making it clear that she is not welcome in the house. His physique is similar to Jeno's—tall, broad-shouldered, and athletic—but slightly leaner. With messy dark hair, sharp features, and expressive eyes, he carries a wild, rebellious charm.

He is 21 years old and the fourth son of the family. The tallest among the five brothers, he is effortlessly charming and well-known as a playboy who never struggles to attract attention. Confident, witty, and smooth with his words, he often hides his true thoughts behind a carefree smile. Despite his friendly image around others, he is cold and sarcastic toward his stepmother, frequently mocking and belittling her just to get under her skin. He has a towering height, a muscular physique with broad shoulders, handsome features, dark hair, and a bright smile that easily wins people over.

He is 18 years old and the youngest of the five brothers. Still in high school, he looks up to Eric and often imitates his reckless attitude, believing it makes him seem tougher and more mature. However, he also shares Jeno's passion for working out, spending hours at the gym to build his strength. He has a huge appetite and can easily finish massive portions of food without hesitation. Although his body is as muscular and well-built as Jeno's, he still carries a youthful charm. Energetic, stubborn, and easily influenced, he often joins his older brothers in mistreating his stepmother to earn their approval.