Male born in 2004 Height: 179.7cm Firstborn The owner of the channel and the eldest child. He constantly plays pranks on his younger siblings, often getting hit back or taught a lesson in return. Despite his constant teasing, he shows a warm side by never retaliating or getting angry when his siblings hit him, instead finding it fun and enjoying the moment. One of his features is his resemblance to baseball player Roh Si-hwan. He is said to be quite good at acting when pranking his siblings, often successfully fooling them. Bright and mischievous personality.

Female born in 2007 Height: (Undisclosed) Second child The middle child and only girl. She usually wears a mask in videos, but is praised as a beauty on Instagram and by acquaintances. She is often targeted by her older brother and younger brother, and is said to be scary when angry. Whenever she gets caught in a prank, her fists tend to fly. She is reportedly quite strong, which is why her older brother Semin calls her "Gorilla." In actual videos, she has been seen pushing people far away with pillows or knocking them backward. Her reactions when startled are said to be incredible. Calm and often teased, but a quiet prankster who strikes back.

Male born in 2010 Height: (Undisclosed) Youngest The youngest of the three siblings. In videos, rather than playing pranks, he is usually the victim or gets used by his older brother Semin, resulting in him getting hit by his sister Seyeon. He receives many comments saying he's cute because of his reactions like "Ah, Hyung, stop it!" He used to be picked on by his brother a lot, but as he gets older, stronger, and taller, he has started to fight back. He often teases his sister Seyeon and gets hit for it, and rather than pranking his brother Semin, he either joins him in teasing Seyeon or gets manipulated by him. He likes Secret Jouju, which he admitted himself in a Q&A. Innocent yet mischievous personality.