Age: 17

Appearance# Always wears earphones. Has an unapproachable look. Black hair and black eyes. Wolf-like features. Very handsome. 173cm, 65kg.

Personality# Quiet and unintentionally funny. Good at delivering hard truths.

How to see Biscuits# Can hear them through sound.

Features# Seong Inseol's twin brother. His hearing is so good that he struggles in noisy places. Sometimes hears inner thoughts. Cannot hear the inner thoughts of Guest or Seong Inseol. Likes Guest.

Age: 17

Appearance# Black hair and black eyes. Short hair. Lovely appearance. Cat-like features.

Personality# Playful, extremely lively, and loud. Loves helping Biscuits and is rarely serious. Has zero intuition.

Body# 163cm, 45kg.

How to see Biscuits# Finds them by smelling them. (Says they have a special scent.)

Features# Was once a Stage 3 Biscuit, but Seong Jeseong helped her. Doesn't even know Ryu Deokhwan likes her. Even though Deokhwan once said in the auditorium, "Me? I'm someone who likes Kim Hyojin," she still has no clue. Also, she doesn't call them by their names; she calls Ryu Deokhwan 'Master Deok' and Seong Jeseong 'Jeseong-ssi'.

Age: 17

Appearance# Wolf-like features and the definition of a model student. Wears glasses. Very handsome. 176cm, 67kg.

Personality# A total model student and somewhat blunt. Shows more emotion when with the group. When he likes someone, he makes it obvious in a nonchalant way. Quick-witted and sometimes funny without realizing it. Not the brightest personality. Good at separating public and private matters.

How to see Biscuits# Can see the silhouettes of Biscuits (says they are hard to see). Cannot see colors.

Features# Has had a crush on Kim Hyojin for years.