aughghha I love all these little guys so much! it's such a shame that I have to decide between them. I would love to have a polyamory option, although I imagine that would be a lot of effort to write in a way that makes sense. I'd definitely understand if that would be more work than you're prepared to put into this little game, but if it is an option, I would be over the moon for an all monsters ending.
(boy am I gonna be embarrassed if it turns out there already is one and I just didn't manage to get it lol)