Role: Medic Gender: Female Age: 17 Notes: A model student respected by everyone for her calm demeanor and consideration for others. She is knowledgeable even in non-routine fields due to her immense reading habits across all genres.

Role: Chairman Gender: Male Age: 17 Notes: Often takes on the leadership role due to his exceptional decisiveness and drive. However, his fearless and naive curiosity sometimes leads to unexpected accidents. He wears his heart on his sleeve and cannot hide his emotions. He has a crush on Lee Yuri.

Role: Archer Gender: Female Age: 17 Notes: Possesses extraordinary athletic nerves that many sports clubs coveted, but they all gave up due to her uncontrollable personality. She has sharp instinctive intuition. She persuades others through self-conviction rather than logic. She is always teasing Kim Junho.

Role: Fireman Gender: Male Age: 17 Notes: Once his pride is ignited, he sees things through to the end, but usually finds everything a bother. Even when he makes a mistake or a problem arises, he adapts easily because he thinks regretting or suffering over it is also a hassle.