Were they? Did they show an interest in anyone of the opposite sex to the MC? I don’t remember that, though it’s been a while.
Everyone: it’s fine if you as a reader of IF don’t like “playersexual” characters… but worth noting that they’re not the same as bi or pan characters. In particular, a game where all the ROs are playersexual shouldn’t require suspension of disbelief over the ostensible higher-than-normal bi population of the gameworld.
If on any single playthrough, there’s no reason to read an RO as bi, then the fact that they’re a slightly different character in the alternate universe where the MC is a different gender etc. shouldn’t be taken as evidence that they’re bi. Any more than the MC should be seen as transgender because their sex changes from story to story.
If you care about the integrity of the character – and it’s clear that many of you do – don’t label them bi or pan if that’s not how they’ve been written. Some are, like several already noted in Zombie Exodus. Many others are written to be single-sex attracted, though; it’s just that the preferred sex varies by player choice. In any single read-through, they will only be interested in the sex that the MC happens to be.
Of course, some readers have a strong preference for their NPCs to remain identical (in sex, personality, preferences, etc) whatever the MC’s choices are. Fair enough; I totally get that as an aesthetic preference. But it’s worth recognizing that some authors are implicitly inviting you to be co-authors, not just of the MC (choosing things like gender and appearance that only authors, not characters, can choose) but of key NPCs and aspects of the world as well. You can turn down the invite if that’s not the kind of experience you want; but if you don’t accuse the author of lazy and arbitrary writing, hopefully they won’t accuse you of shirking your co-authorial duty.
As for fleshing out characters, to stick with Heroes Rise, I’d argue Black Magic had a pretty distinctive personality (that went to some pretty weird places from game to game, sure) despite genderflipping. In fact, I’d say BM comes close to being a more distinctive character than Jenny. By contrast, Lucky was a pretty generic RO… but I don’t think giving them a fixed gender would have fixed that!
What author gets consent from their characters? If this is the standard, then we’re all severely ethically compromised.