The Fallout show's Lucy was described to Ella Purnell as a 'Leslie Knope/Ned Flanders-type' who would 'star in a toothpaste commercial but could also kill you'

The Fallout show's naive Vault-dweller Lucy strikes me as a tricky character to pull off—too wide-eyed and it's just annoying—but actor Ella Purnell artfully balances her performance on the edge between dopiness and competence. I think she responded very successfully to the description that sold her on the part, which was roughly 'Ned Flanders, but with a violent edge.'

In an Amazon Q&A, Purnell said she was aware of the Fallout games because her friends and brothers played them, and...