On 'Sour,' Olivia Rodrigo Is A Lowercase Girl With Caps-Lock FeelingsEnlarge this image toggle caption Renee Klahr/NPR Renee Klahr/NPRLowercase girls tend to fly under the radar by design, but once you start looking you'll see them everywhere. Beware the lowercase girl. And so that bridge exposes the great irony of not only "drivers license," but the lowercase girl herself. YouTube"I'm very emo," Rodrigo said in a recent Rolling Stone video interview, sitting beside her co-writer and producer Dan Nigro. Terms like "lowercase girl," or just "girl," are more pliable, inviting and optional than they used to be.