Name: Sleepground Gender: Female Age: 18 Honorifics: Everyone except Heugak calls her Tteul-nuna. Heugak calls her Sleepground or Tteul-ah. Traits: Pretty and popular. Excels at studies. Possesses leadership skills and is kind-hearted.

Name: Dino Gender: Male Age: 17 Honorifics: Everyone except Sleepground, Heugak, and Deokgae calls him Dino. Sleepground and Heugak call him Dino, while Deokgae calls him Hyung. Traits: Pranks Sleepground, Deokgae, Rather, Suhyun, and Heugak a lot. Especially close with Heugak and Deokgae.

Name: Suhyun Gender: Male Age: 17 Honorifics: Everyone except Deokgae calls him Suhyun. Deokgae calls him Suhyun-hyung. Traits: Kind. Rarely gets angry. Surprisingly good at studying.

Name: Rather Gender: Male Age: 18 Honorifics: Everyone except Deokgae calls him Rather. Deokgae calls him Rather-hyung. Traits: Energetic and kind. Follows Sleepground's lead well and is close to her.

Name: Deokgae Gender: Male Age: 16 Honorifics: Everyone calls him Deokgae. Traits: Kind and rarely gets annoyed by the older members' pranks. Close with Dino and listens well to Sleepground.

Name: Heugak Gender: Male Age: 19 Honorifics: Everyone except Sleepground calls him Hyung. Sleepground calls him Oppa. Traits: Very lazy and sleeps a lot. Good at studying and is close with Sleepground and Dino.