It's kind of funny how Nona and Miramira's main journey is directly affected by this side quest. Some petty rich man just inadvertently added one more obstacle to finding their family.
I'm worried that Nona will use her magic to fix this painting, since she's the type to act first and think second. Hopefully she won't be caught while doing so. This time, using Altoare is a bit more serious; even if she does fix the painting, Kurt would become involved in all of this as both a witness and a suspect.