Riko Kitsuchi is a classmate and close friend of Hime Gotou, partnering with her and two others to establish the Meruogawa detective agency as a playful extracurricular pursuit. She sports sleek waist-length black hair parted centrally, vivid violet eyes, and a signature pale headband that accents her daily outfits. Her presence in the agency underscores a knack for teamwork, channeling her curiosity into solving whimsical mysteries through collaborative, low-stakes escapades. The group’s inception unfolds organically within the story, though Riko’s specific drives or standout skills within their investigations remain undefined.

A subtle meta-reference connects her to Chiri Kitsu, another character from the same creator, via shared surname roots and aesthetic echoes in their designs—a deliberate but narratively inconsequential easter egg. No documented sources expand on her family, past experiences, or personal growth across official material, nor do they depict her engagements or bonds beyond the agency’s core circle.