Shelley Marsh

Shelley Marsh is Randy and Sharon Marsh's daughter and Stan Marsh's older sister. She is vindictive, aggressive, and extremely ill-tempered, referring to those around her as "turds" and often beating or even torturing Stan and his friends when adults are not around, though nonetheless compassionate; later seasons have instead emphasized Shelley as assertive and focused more on her relationship with her father.

Read more about Shelley Marsh on the South Park Public Library wiki at Fandom ↗