Dora dressed in clothes she knew would pass as Muggle,t hough perhaps a little on the eclectic end. Her real muggle clothes were either very casual or very professional, and she didn't feel comfortable in either with someone she didn't know terribly well but who wasn't a work contact either.
She was exactly on time as always, punctual to a fault. If Dora was late, then generally there was something wrong or she somehow got really, really caught up in her work. "I'm ready, I think. I admit I haven't been in a car but a couple of times, though," she said.