In person: Clara/Doctor
The Doctor was well aware that there were plenty of things in the universe he didn't know absolutely, so he'd consider himself open minded, he actually liked mysteries. They were always fun, mysteries, as long as they were the kind that eventually had answers of some kind. But he did make his mind up about certain things, and when that happened, that was that. He put his foot down. He experienced someone who knew his future before, with River. She joked about spoilers and he saw her die. He wouldn't have minded meeting Clara much, except for what was coming out of her mouth and fingers, nope, he didn't like that at all.
So he went on adventures and he took comfort in knowing Rose was near. But eventually the mystery got to him. The Doctor only took a certain type of person on the TARDIS, and he always knew who fit with him, right off the bat. It was easy. They had a mad gleam in their eye, same as him. He scowled at Clara's back, but decided to join her. He was rude, that was him, rude, and he was stubborn too. He was in his skinny suit with wire framed glasses on his nose, and his sneakers were new and shiny.
"Right then," he said without preamble. "When and where are you from?" He wasn't asking about his part in her life, not yet. Just her.