For the finer differences between symbols, they'd need Namine here. She seemed to be the sort to remember that kind of thing, with how much drawing she did. Even then, if it wasn't the right symbol, that wouldn't be much of a help except to rule out the possibility.

Xion couldn't speak much to the differences between humans and demons. Maybe demons were so close to the darkness that they weren't as affected by it. Chances were good that was the case, if they had names like Fear and Malice.

"Yeah, the library's upstairs." She nodded in agreement with their suggestions before leading the way back into the hall.