1. Healing it may have some limited effect but the external symptom like blindness will quickly come back.

2. There will be! The elderly kedan couple will explain that a nice young gentleman offered to do up the invitations for them and they accepted, thinking no ill of it. They'll provide a description for a youngish, dark skinned kedan man, about 25-30 but apologetically remind the Foreigners that as kedan are shape-shifters, it's entirely likely the perpetrator doesn't appear like this regularly.