Lieutenant Chesinen was a soldier working for the Dione-Kisumu Company. She was codenamed Yellow.
After leaving her family, she went to Kisumu and got a degree in electrical engineering and became an employee of the Dione-Kisumu Company.
Chesinen was one of the DKC soldiers sent to investigate the outbreak of psychic powers on Yemaya 4. The cure brought by Bernice Summerfield and Roz Forrester from GRUMPY made her lose her psychic abilities as well. She decided not to leave the planet with the other soldiers, and joined the colony instead. (PROSE: SLEEPY)