"Disagreeing in cooperative dialogs doesn't just influence choice and consequence, it also shapes how well the two protagonists are compatible with one another. Every decision adds to a social stat: what do your heroes' traits tell about their affinity? Will they end up as friends and even lovers, or do they have to learn to live together out of sheer necessity?"
This was posted quite a while ago, so it is probably outdated now.
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but i was seeing just now the latest stream of the game released yesterday and someone asked Vincke if the player could have romance he said NO.
Well, from what I remember, devs earlier said that there are two separate systems going on with protagonists. One of them is the affinity aka. traits, which represents whether protagonists are of the same mind on moral choices they encounter in the game. And the second one is affection, which is the "under the hood system" that gathers some parameters from personal banter between protagonists (for example, where one of them praises\scolds the other for being quite a thief, or for good battle skills etc.). And that this second one supposedly will influence some end game outcomes. But, who knows what's actually going on with these systems now. For example, I remember them saying that affinity will give some sort of bonuses to protagonists, like, those of the same mind will get combat bonuses when they are near each other. But I think it was replaced by leadership talent. Many things changed over the course of the year, like, now we can make protagonists of the same sex and their backstories are completely different from what they were a year ago. So, I don't want to be a downer here, but romantic relationships between protagonists may as well have been ditched, if they even were in development at all.