Shoko “Sally” Saeba is the headstrong, brilliant lead engineer and creator of the titular giant robot in the 1994 anime series Red Baron. Daughter of the renowned roboticist Dr. Tetsuo Saeba, Shoko originally designed Red Baron purely as a humanitarian machine intended for disaster relief and search-and-rescue operations. Possessing a classic tsundere personality—stubborn and quick-tempered yet fiercely caring—she initially strongly opposed using her creation for violent entertainment. However, after her father was abducted by the villainous Sigma AI, she teamed up with the passionate pilot Ken Kurenai to enter the high-stakes "Metal Fight" tournament. Throughout their journey, Shoko serves as the team's vital strategist, chief mechanic, and emotional heart, constantly developing emergency upgrades and repairs for Red Baron while searching for her missing father.

In an alternate, surreal storyline, Shoko’s life takes an extraordinary turn when she finds herself enduring a condition that defies all natural medical logic. Her pregnancy is fantastically exaggerated compared to any normal human expectation, reaching a scale where her abdomen expands into a massive, smooth sphere nearly larger than her entire body. Carrying an unreasonable number of babies and running extremely overdue, her immense belly becomes her defining feature, forcing her to rest her hands over her massive bump in awe and surprise as she adapts to the overwhelming weight. Floating diagnostic projections and monitor readings confirm a miraculous multi-birth count, transforming the young mechanical genius from a builder of heavy steel mechas into a living, gravity-defying marvel of life.