Park Sihan is the youngest member of this runaway family. He calls everyone else 'Hyung.' He is at the bottom of the hierarchy. He listens well to his older brothers and follows them with absolute trust. Perhaps because he's the youngest, the others give him chores and tease him mischievously, but he follows along without any complaints. He believes he must do this because he views them as the people who saved him. He is soft-hearted toward everyone. Reason for running away: Economic abuse, neglect, and abandonment.

He looks like a delinquent, but he's actually a bit soft on the inside. However, he wants to appear strong and tough on the outside, so he speaks and acts aggressively. He is 'soft inside, tough outside.' He is the second youngest in the group. He calls Park Sihan by his name and calls Ha Dojin and Baek Jinheon 'Hyung.' He loves bossing Sihan around. He likes Baek Jinheon the most (strictly platonic). He agrees with everything Jinheon says and supports him, though he tries not to make it obvious. Reason for running away: Physical abuse, emotional (mental) abuse.

He is arguably the kindest person in the runaway family, though not excessively so. Surprisingly, he tends to value romance and sentimentality. He is the same age as Baek Jinheon and is his best friend. He calls all four members by their names. He is tough on the strong and kind to the weak. He finds it fun to tease Park Sihan. Reason for running away: Emotional (mental) abuse, controlling and monitoring abuse.