Nope, she's always been ...99% OC. I almost forgot that Leigh used the name (as well has her big bro, Hayato's) for npc characters in a Pokemon 4th gen RP forum-thing she used to participate in, before we became friends. But her parents are completely original folks who never met the Azu cast when they were younger or any sort of connection like that. Even in this old draft of a story, Sachiko still met Miko in grade school.