Indeed, but I think she doesn't realize when her eye magic activates, so (as in this chapter) I think at least one person will always get charmed until she'll learn to control it....abd that one person is already too much, the damage is done
About notifying the clergy....I mean, the other girl was literally kicked out because her father gave her an orb to survive an illness....this shows the lack of communication/trust between the two parties (nobles and clergy/royalty)
Probably the count has his reasons to keep Eva's eyes secret
Unless proven otherwise, I always assume the author wss just a bad writer. When a solution seems simple, the writer should preemptively setup why it isn't feasible, imo.
Since, for an instance, everyone knows that her family has a magical eye running in their genes. It's not a secret, and yet, they couldn't prep an insurance for something as catastrophic as bewitching everyone in the event?
I'd have done it as so: since "honor" is vital foe nobles, it makes sense they can't have her go around blindfolded as if she's a leper. Given the bracelet is a good way to deal with the issue, the dad should instruct her, and her aids beforehand, to keep her eyes closed if anything goes badly. I'd even have her dad have her practice avoiding other people's eyes.
However, during the event, given the current circumstances, I'd have something happen that'd make her open her eyes and accidently look at someone. Accidents happen, afterall.
Tho, honestly I think the best move os to pull a bait and switch. I.e: something else entirely will fuck up the event.