Idea add an older yugo from arc v about 17 or 18 but he been gone four years in the xyz dimension while Ray's counterparts were able to be four again yugo was stuck with yuya and yuto for 3 years so they along with yuri are stuck as one , yugo is also a signer and the earth bound immortals cant be targeted by lv 1 or higher monsters making xyz a weapon against the dark singers as well
The power that created pendulum summoning will create a turbo duel rank up spell (rank up launch speed force) kallin was revenge on yugo and yusei

blander than week-old beans.