[He looks amused for a second after she mentions cursing Date, but it doesn't last too long before he shakes his head.]

No, those are the only two sources I know. Though... I think the personal demons actually give out two items every week. Do you remember when Date and Rynlan got cursed during the debate activity? I had one of the items. But the one I didn't take had a picture of the same weird animal Date was transformed into.

[So he assumes the other one was given to someone else, and that person cursed Date.]

... But those were still completely harmless. So, I think, whatever was used to control Tuuri. It must've come from an adventure.