Summary
Sewashi serves as the great-great-grandson of Nobi Nobita. He traveled from the future to the present alongside Doraemon, arriving to assist Nobita in resolving looming issues regarding his destiny. Among these concerns was the threat of Nobita marrying Gian's sister, a fate that has now been averted. With this problem solved, Nobita is on track to marry Shizuka Minamoto instead.
