Oh Nu Ri

Reclusive Nature: He hates going outside and is described as being allergic to the sun. He spends most of his time indoors, using his computer skills to support the team's investigations.
Computer Genius: He is a brilliant hacker and is essential to the team for finding digital evidence, tracking people, and uncovering information that the others cannot.
Loyalty: Despite his introverted nature and initial lone-wolf tendencies, he develops a strong sense of loyalty to the "Mad Dog" team members as the series progresses.
Eccentricity: His unique lifestyle and social awkwardness contribute to an eccentric personality. Shows romantic gestures through surprises.