The Walker family
* Nora Walker, matriarch of the Walker Family and a stay-at-home mother; widow of deceased husband William Walker.
* Sarah Walker, Firstborn child of Nora and William, a working mother, President of Ojai Foods and former CEO of Greenotopia; ex-wife to Joe Whedon.
* Kitty McCallister, second child of Nora and William, one year younger than Sarah, a writer, mother and former radio host and communications director; widdowed to Robert McCallister.
* Tommy Walker, third child, two years younger than Kitty, and firstborn son of Nora and William, father and former President of Ojai Foods; ex-husband to Julia Walker.
* Kevin Walker, fourth child of Nora and William, two years younger than Tommy, pro bono lawyer and the former communications director for Senator McCallister and former corporate lawyer; married to Scotty Wandell.
* Justin Walker, fifth and youngest child of Nora and William, eight years younger than Kevin, medical student, war veteran of Afghanistan and Iraq, and former drug addict; formerly married to Rebecca Harper.