Independent, non-selective Werewolf AU Ryou/Yami no Bakura where Yami no Bakura is his werewolf personality who he calls "inner beast". He was turned into a werewolf by the Millennium Ring(kinda like how stone masks turn people into vampires in JoJo's Bizarre Adventure). He transforms every night but how much he changes depends on the phases of the moon. During new moon only his personality changes turning him into Yami no Bakura. When the moon starts showing wolf features begin to appear. When he had the Ring it's evil power allowed Yami no Bakura to take over even during the day but obviously he wouldn't transform further during the day. He remains werewolf even after the Ring was gone.(But then Yami no Bakura can only come out at night.)
The timeline can be canon or post-canon and in some post-canon cases he could also still have the Millennium Ring if he had gotten his hands to it when Kaiba was messing with the Millennium Items.
This is a sideblog so all follows will come from my main no96-blackmist.tumblr.com. You can also find info about general practices in there.
There is one rule: No chain messages.
Check out also my other sideblogs: barianprogenitor.tumblr.com(Post-canon Don Thousand from Yu-Gi-Oh! Zexal)
chaosmalik.tumblr.com(Barian AU Yami Malik, related to Zexal), bariankura.tumblr.com(Barian AU Touzokuou Bakura, related to Zexal) sphinxmalik.tumblr.com(Sphinx AU Malik Ishtar)