Most of the Doctor's companions took a few days after they arrived to work up the nerve to wander around on their own, appropriately awestruck and nervous about getting lost. Amy, however, set off almost immediately, the very night they returned from Starship UK. He sat in the library and listened to her clanking around, touching things, opening doors, generally wandering.
Not shy, this one, he thought, filing this piece of information away with the data he was still gathering on his feisty new companion. He hoisted his reading glasses back up onto the bridge of his nose and went back to reading, certain that the ship would let him know if there was a problem.
It wasn't until the next morning that he realized Amy was missing. Well, not missing – she was clearly still on board, or he would know. What she was, in fact, was not present. He checked her room, he checked the kitchen and the library and the console, and then he was forced to acknowledge that she had most likely gotten herself lost, or locked in, or hopelessly turned around.
Grinning a little at the challenge, he straightened his bow tie and set off after her.
Forty three turns later, the TARDIS led him to a door that was temporarily illuminated by a soft blue glow, indicating that this was the place he was looking for. He opened it slowly and stepped inside, only to find a sculpture gallery, full of angular white pieces and dangling chimes he had collected in some former life.
Amy was curled up at the base of one of the statues, asleep, her long nightie and robe tucked around her and her flame colored hair spilling around her. She looked peaceful and just impossibly young.
"Amelia Pond," he said softly, crouching down to touch her shoulder.
Her eyes popped open immediately. "I got lost," she admitted sheepishly. "I finally gave up."
He smirked. "Well perhaps you shouldn't go exploring in the middle of the night on an unfamiliar ship. And oh, by the way, did I mention to you that she's nearly infinite? Pretty sure I mentioned that." He reached out and bonked her on the nose gently.
Amy yawned and sat up, then looked down in distaste at her clothing. "I've been wearing this for days. Can you get me back to my room for a shower?"
He held out a hand and pulled her up, and set about retracing their steps.
Might as well get that first rescue over early, he thought. Nothing breaks the ice quite like saving a new friend from peril.