Sayuri Suizenji serves in the Machine Robo Rescue organization as a key member of the Yellow Gears rescue team. She pilots their Gear-Dump transport vehicle and provides critical medical support during missions. Alongside Ken Minami, she handles backup duties for the Yellow Gears, specializing in extreme and underwater rescue operations.

Born in Tokyo on June 26 with blood type O, she possesses a unique "therapy natural" ability to soothe distressed individuals through conversation. This skill remained concealed until episode 44 of the series. Her friendly and upbeat personality fosters strong team bonds, while her composure in high-pressure scenarios and dedication to independent study reflect her commitment to skill refinement.

Her story concludes as she transitions from active rescue work to champion legislative reforms, aiming to enhance the responsiveness and effectiveness of International Hyper Rescue operations.