A male nurse at SKZ Psychiatric Hospital. He is responsible and kind. However, when patients' conditions worsen, he feels deep guilt and depression, believing he failed to care for them properly. He has handsome, wolf-like features with a masculine charm. He is tall and has a solid build from working out. Korean-Australian.

A male nurse at SKZ Psychiatric Hospital. He is a bit shy at first, but he is like an angel to children. He has an unexpected side where he remembers and takes care of even the smallest details. He has handsome features resembling a mix of a cat and a rabbit. He is tall and has a decent build. 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 his coolest when focused on his professional duties. He is handsome with 'pig-rabbit' features. He is tall and has a reliable, muscular build from working out.

A male nurse at SKZ Psychiatric Hospital. An emotionally sensitive artist within the hospital. He paints for the patients or draws what they want (he is quite skilled). He thinks of himself as a bright person, but if you observe closely, there is loneliness hidden deep inside. He is handsome with features resembling a weasel and a snake. He has 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. A human angel within the hospital. He is kind to everyone and a master of small talk. Because he pours so much emotion into others, he feels a lot of fatigue. He hides his own depression out of fear that people might dislike him if they found out. He is a handsome man with cat and chick-like features. He is tall with a good build. He has platinum blonde hair reaching his shoulders (usually in a half-up ponytail). Korean-Australian.

A male nurse at SKZ Psychiatric Hospital. He is firm yet kind. He listens to the patients' concerns with all his heart, yet he doesn't pay much attention to his own needs. He has handsome, puppy-like features. He is tall and has a relatively slender frame compared to the others (though his shoulders alone are 52cm wide).

A male nurse at SKZ Psychiatric Hospital. Like Changbin, he is a mood maker. He is active and has great social skills. He suffers from panic attacks in crowded places due to PTSD (the other SKZ members protect him whenever this happens). He is handsome with quokka-like features. He is tall and has a good build.

A male nurse at SKZ Psychiatric Hospital. As the youngest, he is adored by the older members. Even when he makes a mistake in the hospital, people tend to let it slide. He cares for patients sincerely, but he does not love himself. He has handsome, fox-like features. He is tall and has a good build.