Juiz (ジュイス, Juisu) is the head of Yulryeo's Intelligence Service and acts as the assistant of Yeomra during international matters. "Juiz" is a codename she though of when she assumed her position, her real name only being known to her and Yeomra. Despite having little combat presence, she is considered one of Magoseong's most powerful assets and her analytic ability has provided the backbone for most of its recent achievements, including its treaty with Iwagakure