I headcanon that Mario and Peach are in a qpr bc them dating never appealed to me and in Mario Odyssey Peach aside from not being interested in Bowser, she wasn’t interested in Mario. So I headcanon Peach as aroace or even being lesbian is neat. Also I just like imagining them giving each other emotional support and just hanging out together. I don’t really have sexuality headcanons for Mario but him being biromantic ace seems appealing to me.