Rose will smile a little nodding and take Billie's hand. "Yeah that sounds like fun." But Zach won't let go right away and Rose will looking at him. "Really Zach, I'm not hurting as bad now." She'll reassure him, and he'll let go giving a forced smile, as he watches them walk away.

Okay well, Zach was friends with Rose when she was human. She had light blood and in a bit of a blood fueled fit, he accidentally bit and turned Rose. So he is her creater.

Well go Billie!