She never met Dawn. He feels that like a hand closing slowly around his heart; if he'd had the chance, if he'd just been given a little more time, he's sure he would have felt this same sentiment if he'd met her.

Mary's been the little sister Riku never had the chance to have.

"He..." More honestly, Dawn had been a replica of himself, a little younger, a little stronger in the Darkness that Riku had struggled to master back when he was first created. But to Riku, Dawn had become so much more. His own person, a friend, a sliver of his heart gone missing, lost in the dark.

"Something like that."

Riku looks away from her.

"Mary, did you have any brothers or sisters?"