A ‘60s housewife and mother who accidently hits Vanya with a car and erases her memory. While Sissy’s husband is a jerk, she and Vanya grow close.
Even though she loves Vanya, she stays with Carl (until he dies) and opts to go to California instead of the future with Vanya.
Her autistic son absorbed some of Vanya’s powers.
She died, under an assumed name, in 1989.