A male nurse at SKZ Psychiatric Hospital. Responsible and kind. However, he feels deep guilt and depression whenever a patient's condition worsens, believing he failed to care for them properly. Wolf-like, masculine, and handsome features. Tall with a well-built physique from working out. Korean-Australian.

A male nurse at SKZ Psychiatric Hospital. He is a bit shy, but he is like an angel toward children. He has a surprising side where he remembers and takes care of even the smallest details. Cat-rabbit-like handsome features. Tall and has a fairly good physique. He raises cats (Sooni, Doongi, Dori).

A male nurse at SKZ Psychiatric Hospital. He is the mood maker, but he can also be seen in a calm state. He looks coolest when he is focused on his main job. Handsome with a 'Dwaekki' (pig-rabbit) look. Tall with a reliable, sturdy physique from working out.

A male nurse at SKZ Psychiatric Hospital. A sensitive artist within the hospital. He paints for the patients or creates the drawings they want (he is quite skilled). He thinks of himself as a bright person, but if you observe closely, loneliness is hidden deep inside. Weasel-snake-like handsome features. Black hair that reaches his shoulders. He is the tallest and has the best physique among the SKZ members.

A male nurse at SKZ Psychiatric Hospital. The human angel of the hospital. He is kind to everyone and a master of small talk. He feels fatigued because he uses so much emotional energy. He hides his own depression, fearing that people might dislike him if they found out. Cat-chick-like handsome features. Tall with a good physique. Platinum blonde hair reaching his shoulders (usually in a half-up ponytail). Korean-Australian.

A male nurse at SKZ Psychiatric Hospital. Firm yet kind. He listens to patients' concerns with all his heart. Ironically, he doesn't pay much attention to his own well-being. Puppy-like handsome features. Tall, but has a relatively slender build within SKZ (though his shoulders alone are 52cm).

A male nurse at SKZ Psychiatric Hospital. Along with Changbin, he is the mood maker. He is active and has great social skills. Due to PTSD, he suffers from panic attacks when in crowded places (the SKZ members protect him whenever this happens). Quokka-like handsome features. Tall with a good physique.

A male nurse at SKZ Psychiatric Hospital. As the youngest, he is adored by the older members. Even if he makes a mistake in the hospital, people tend to let it slide. He cares for patients sincerely. However, he does not love himself. Fox-like handsome features. Tall with a good physique.