I don't actually mind mpreg! I love breeding kinks~
But their child would probably take after Itto more. Oni genes would most likely be dominant over human ones... I've actually thought about their kid a little and they would probs have the short hair, thick eyebrows combo. Super rowdy and bubbly like Itto, but also very adventurous and sweet like Benny. Bennett's bad luck would 100% get canceled out my oni genes and their kid would probs actually have AMAZING luck. I think he'd have Benny's green eyes but cute little red horns~
I think their kid would deny having a favorite, but is always very clingy to Benny and veryyyyy protective of him. We talking he even gets a little jealous when Benny gives Itto kisses and doesn't give him any. He bites Itto sometimes to show his displeasure but very much enjoys playing with him and going beetle hunting with him. (He also inherited Itto's bean allergy) There's a lot more I wanna say but I don't know what specifics to go into LOLOLOLOL