Who is Emerald Schwartz from Welcome to the Monkey House and what is their importance?

Emerald is Lou's wife and is ninety-three years old. Emerald is very dissatisfied with life, and at the beginning of the story is venting to Lou about how she thinks it should be: anti-gerasone should not be sold to people over age one hundred and fifty. She longs for real food, and most of all, for some space and privacy. She wants to dilute Gramps' anti-gerasone. She resents the way Gramps controls the household. When Gramps leaves the apartment to everyone and Willy tries to take over, Emerald speaks out in favor of Lou (and, by extension, herself) getting the bedroom. Emerald ends up very contented in her prison cell.