Goro Yatagarasu serves as a supporting character within the narrative. He is a younger police officer affiliated with the International Criminal Police Organization (ICPO), working directly under Inspector Koichi Zenigata as an assistant.

He demonstrates adaptability and loyalty in his professional duties. Introduced as a comparatively inexperienced officer during earlier events, he develops professionally while maintaining respect for Zenigata's methods and experience. This dynamic positions him as a diligent subordinate who balances adherence to protocol with an understanding of Zenigata's unconventional pursuit of Lupin III.

Within specific operational contexts, such as those unfolding in locations like Kotornica, he takes on investigative duties. These often involve collaborating with fellow officer Arianna to resolve complex situations, including clearing Zenigata's name when the inspector faces false accusations. During these investigations, they encounter obstructive behavior from local law enforcement, requiring persistence and resourcefulness to uncover critical evidence.

His physical appearance remains consistent. He presents as an adult male with black hair typically styled to neck length and black eyes. His standard attire consists of formal professional wear, including suits and ties.

The character's narrative function centers on providing support within ICPO operations and contributing to team dynamics during investigations. While his personal backstory lacks extensive elaboration, his actions consistently reflect his role within the law enforcement structure surrounding the pursuit of Lupin III and associates.