Cosette wasn't quite sure how to answer Sirius' question. She pursed her lips together for a moment trying to figure out what to say. She didn't want to say that she was French, which meant that she had had an accent when she first arrived at Hogwarts. Despite the fact that the first couple of years she went there, she had an unmistakeable accent, she had remained enough under the radar that few people remembered it. She doubted Sirius was one of them. Though he did seem to remember her hanging out with Lily and Alice...
"I didn't know anyone when I came here," she explained honestly. Aside from Candyce, she was the only student there who spent her childhood in France. She had no chance of knowing anyone. "It was hard to get to know people and it made me... well, it made me shy."