Because that smile, along with that silky, jet black hair makes her look so lovely.
"Can you feel it? Can you feel the flowers?" — Vignette.
She held her like a fragile doll, kissing away those accursed tears—trying to soothe her pain. It was the least she could do for her, before she would finally crash into despair.
She can feel the remorse that the Princess still carries in her heart—for them.