I'd like to point out that Hermione stopped smiling 1 year before Harry and Ron did. She probably knew the danger long before them <--- I'd like to point out that Harry stopped smiling after year two and Hermoine smiled year three.
I got Tonks! Which "Harry Potter" Witch Should Be Your BFF? You and Ginny aren’t as naive as people think. No, you’re both very smart, brave and caring. You can play quidditch together and charm everyone with your bright personalities.