I'm... Having a hard time coming up with any. What few examples I can think of are either bi or they're not the main or a playable character at all.
I think naming erotica stuff is pointless too because at least japanese examples are often produced to appeal to hetero teens of the opposite sex and the whole point of their existence is to deliver on that premise. Also I'm not knowledgeable about stuff like Nights of Azure at all, but the game comes off as "hell yeah hot yuris" rather than serious, well intended representation of lesbians (as is the case with a lot of japanese media sadly), but I'd love to be corrected on that.
Also is kinda frustrating to see Yusuke from P5 so commonly interpreted as homosexual because he's quite blatantly hetero, being sexually attracted to Ann but never showing more than friendly praise for men. At most I'd call him aromantic, and this comes from someone who really wishes he was a romantic option for Joker... But I guess him being effeminate blinds players about these things. I mean, someone just suggested Tingle based on how flamboyant he is despite him starring games where his goal is being popular among women lol.
Also this thread made me really interested into Fire Emblem... Ike's duology at least.