How is it supposed to be? Is it stated somewhere in the book, that Geralt's feelings are a constant value and nothing can change them? Remember how he was disappointed with Yen when he decided that it was she who had betrayed him and had told Vilgefortz where he had been?
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Oh, then you should certainly mistrust Yen, because there are much more things she hides from him, both in the books and in games.
Defnitely I agree with you.
I just can't bring myself to trust yen, then again it seems no one can and she only shares when cornered or untill the very last moment or if she is discovered what her plans are. The attitude, mistrust and treatment not only to Geralt but also the perception from other NPC about her are enough for me send her away and be free of her for good.
Not once did I heard anyone say aaaanything good about yen something that if I don't know her it would make me consider "wow! Geralt is trully lucky to have her" nope. I can not rely on the past because many things have changed and people evolved and yet yen has been mistrustful with everyone, if only she would've show more trust or care from the beginning then I might've consider her since I didn't knew her but now? nope.
As for Triss I'm glad of what they've presented and what I've heard from the books and what I've heard form Doug Cockle's interview. At least I've seen far more better arguments in favor of Triss. I like that...