Ron and Harry noticed, which said a lot in and of itself. They never noticed anything that didn't actively crawl down their throats, so the change in her must be decidedly pronounced. Perhaps it was also that she looked like a seventh year while she was supposed to be fourteen. She hated to admit it, but she was beginning to grow bored of them. She loved them dearly and would gladly kill and die for them, but their company grated on her already fragile tolerance.