Tbh the twins resemble Luke and Yuga's persona combined.
Someone said that the twins are Luke and Yuga's children cause the girls don't seem to fit or so.. and I think it might be right.
Yuhi at first glance looks like Yuga, but also is so similar to Luke in terms of eye shape and hair (designvise). Yuhi's dumb side and over the top personality is from Luke while he has the spirit of Yuga for fixing things together. Do I even have to explain how his personality is like Luke?! As for Yuamu, She is smart just like how Yuga was always one step ahead of others and she is kinda thirsty for power and likes to be in charge. Remember? Luke had this going on too. The feeling and attitude they have and how they seek for greatness.. I honestly thought about this and I can't see anyone who could be Yuga's partner out of the girls. Cause the twins remind me of Yuga and Luke. Unless they're their grandchildren. But I seems like Mutsuba town is low tech compared to Goha city, so what if Yuamu is Luke's mother while Yuhi is Yuga's father? IDN so many possibilities. I hope they give answers soon.
Don't let me start on their decks. Yuamu has a dragon deck "cough" Luke