Tony: Hasn't anyone ever told you
that second-hand smoke kills?
Marion: Yeah, but they're all dead.
-Halloween H20: 20 Years Later.
Marion in the Halloween franchise
Marion started as Marion Chambers, a nurse who once worked with Doctor Sam Loomis back in the 70's and was last seen when Michael Myers killed her in 1998.
She first appeared in the original first two Halloween movies played by Nancy Stephens. Like many Halloween characters Marion appears in various comic books of the Halloween franchise.