Wanda Seldon was the granddaughter of Hari Seldon. She was the daughter of Raych and Manella Seldon. If it were not for her, Seldon may not have been able to set up his Second Foundation as envisioned by Yugo Amaryl before his death. Wanda was the first person Seldon had met with her unique brand of mentalic powers, but not the last. Along with Stettin Palver, she formed the seeds of the Second Foundation and ensured the survival of the Foundation until and beyond the formation of the Second Galactic Empire, assuming Galaxia didn't take place.