- See also: Fanfiction involving Randelly
Shelly is Randy's daughter as well as Stan's abusive older sister. Randy and Shelly have only interacted few times on the show, such as Randy intervening when Shelly takes her anger over not being able to communicate with a boyfriend online due to lack of internet out on Stan (in “Over Logging”), Randy confessing to Shelly that he is Lorde (in "#HappyHolograms"), Shelly telling Randy that he doesn't try to know her but Randy says he wants to, as he strongly believes she hates him (in "PC Principal Final Justice"), and Randy yelling at Shelly for giving the recess monitor an image of a dog's butthole so she could vape (in "Tegridy Farms"). Randy and Shelly's bond is the least prominent in the Marsh family.
Like the majority of adult/child and incest pairings, this pairing is extremely obscure, and there are no known fanfictions that include this pairing.
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