Serenity
Serenity is a hippie friend of Helen and Jake in C.E. Forman's The Lost Seasons series, making her only appearance in "Fireworks." Incredibly shrill and paranoid, Serenity sees "the Man's" conspiracies in everything.
Fanfiction
In "The Age of Cynicism," Kara Wild indicated that by 1980, Serenity was going by her given name, Vanessa. Although Helen criticizes her for having "sold out," it is clear that Vanessa has not lost her touch, worrying about the "nuclear winter" that Reagan will unleash and imagining that her son is drawing bombs instead of clouds.
Trivia
Forman developed Serenity and the other characters after viewing clips from "That Was Then, This Is Dumb."