As mentioned in my other post that I can't edit for some reason, my wife is very similar to your GF in terms of play style. Loves Zelda and low stress games. She absolutely LOVED Witcher 3. played it through including all expansions minus the last boss (he stressed her out...). She owned a vineyard, played gwent, was a frequent visitor to brothels and generally just adored it. She wouldn't let me start my play through for 8 months!

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I highly recommend it, she can play it on easy for the low stress aspect.