Purple_Girl

Answer: Giry had known the Phantom since they were children, knew what his life was like then, and she has great pity for him (and great admiration, as a lover of the arts herself.) She deliberately distances herself from his wrong doings until Raul convinces her to speak up. She also understood the Phantom didn't intend to harm Christine.

Purple_Girl

Question: Why are the Phantom's footsteps walking distance when he runs to the statue? Also, when did he learn to climb so swiftly?

Answer: Not everyone runs in big strides. The phantom has also had most of his life to master climbing, sneaking, hiding, etc. To see and take what he wants from the theatre without being seen, in his youth he had little to do except explore and learn everything about the place and the fastest ways to get where he wants to go.

Purple_Girl