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- United States
I don't think we strictly know that they change on TLitF casts? It's something we've suspected that the QMs may have just not seen fit to correct us on. Personally I'm not sure I buy it: her eyes change colour a lot and given how averse she was to paying TLitF's price I find it hard to imagine her using it that often.
I think it was implied she was more willing to use it when Hazou ordered her to help the family and took responsibility for her choices in doing so, and as more of her memories got emotion wiped she would have been less and less reticent to use it.
If it's not TLitF then we should probably be trying to figure out what's making her eyes change colors, it's unlikely to be a good thing.