Kaoru Shindō serves as a junior member in the security organization SARG, operating under senior members Wataru Chikushi and Hana Shishido. His surname Shindō uses kanji signifying "advance" or "progress" and "wisteria," while his given name Kaoru translates to "fragrance."

He presents as an adult male with black hair trimmed to ear length and brown eyes, typically wearing a jacket, tie, and gloves.

Within SARG's operations, Kaoru engages in enforcement activities, including executing organizational directives and supporting senior personnel during security missions. He participated in the arrest of Shuuta Aoi after the KANAE system flagged Shuuta as a terrorist threat.