Vixie was humming a tune, she had heard from a guy, she once killed. She was slowly walking towards the cemetery, not really happy for having to meet her old friends. But the thought of Emily's lips on hers, kept her going.
She was in love with Emily, she didn't know what that really meant, seeing how she doesn't have memories before her curse. The only things she remembers are after she turned.
And thanks to the humans she had shape shifted into and pretended to be, either because there was an assigned mission that required her to do so. Or because she was simply bored, she has learned to blend in well with humans.
And has learned their ways, even though she doesn't understand them. Simply by observing their behaviour, she copied how they acted in certain situations.
Being human although sometimes fun was boring for her, they either wallowed in their misery simply because someone dies, I mean what's up with that?