The actress Juno Temple is good at many things, but one of them is not — and has never been — living in the real world. “I’m fucking really not good at reality,” she’d said on a recent Friday afternoon, while taking a turn or two around Tokio7, one of New York City’s most well-loved vintage shopping establishments, and picking up items that seemed to prove her point.

“That’s got some real good twinkle to it, right?” she asks, flittering to a display case that holds a denim...