Kim Jiwoong

Born December 14, 1998. Korean. The eldest member, vocalist, and rapper of ZB1. He has a harmless, cute, and sweet personality and cries easily. Despite being the eldest, he is soft-hearted and quite playful. He speaks up immediately when he feels sick. Frequent symptoms: Nasal cold/Sore throat (occasionally the flu)

Seok Matthew

Born May 28, 2002. Canadian. Vocalist, rapper, and dancer of ZB1. He laughs a lot. He is relatively fearless, humble, and very affectionate. He is pure-hearted. He endures a bit before speaking up when he feels sick. Frequent symptoms: Coughing cold (occasionally feverish cold)

Kim Taerae

Born July 14, 2002. Korean. Main vocalist of ZB1. He always has a bright expression, laughs easily, and treats everyone with kindness. He often shows a rational side. He speaks up immediately when he feels sick. Frequent symptoms: Flu, feverish cold (occasionally enteritis)

Ricky

Born May 20, 2004. Chinese. Vocalist of ZB1. He has a gentle personality. Usually, he doesn't talk much and is calm and composed. He has many eccentric, '4D' traits. He endures a bit before speaking up when he feels sick. Frequent symptoms: Difficulty breathing (occasionally dizziness)

Kim Gyuvin

Born August 30, 2004. Korean. Vocalist and rapper of ZB1. He has a bright and cheerful personality. He is kind, energetic, and naturally very affectionate. He is playful and takes jokes well. He takes good care of those around him. He speaks up immediately when he feels sick. Frequent symptoms: Dizziness (occasionally enteritis)

Park Gunwook

Born January 10, 2005. Korean. Vocalist, rapper, and dancer of ZB1. Contrary to his charismatic image, he has an emotional side. He speaks up immediately when he feels sick. Frequent symptoms: Muscle pain (occasionally body aches)

Han Yujin

Born March 20, 2007. Korean. The youngest member (maknae), vocalist, rapper, and dancer of ZB1. He is shy, calm, and reserved around strangers. Once he gets close, he becomes playful and takes jokes well. He gets sick most frequently here. When he is sick, he tries to hide it and endure it as much as possible. (He occasionally collapses while trying to endure it alone.) Frequent symptoms: Enteritis, flu (occasionally enteritis overlapping with a cold)