[Sora jumps a little when Lea speaks up. He'd been a little too caught up in his thoughts regarding the fragment of a Keyhole and his Spirits hadn't alerted him. In Bruce's case, it's obvious why. On the other hand, the as yet unnamed cat really doesn't have a excuse... unless he's just as much of an asshole as Bruce...

Being a bit sleep deprived probably doesn't help Sora's case much either. To answer the question...]

I think it's a piece of the Keyhole. But this is really bizarre. I've never heard of Keyhole being broken into pieces.