Kenji Matsuda as a Makai Knight = badass
Good to see the Beast of the White Knight characters again. Though I wanted to see if Rin still looks like Momochi
Even if everything is pointing at him (good swordsmanship, his compass almost killing Jabi, looking pissed when there's a knight-priest comparison/remark, etc.), I still don't think Leo is Jyaku.
Because if he was, he wouldn't have given Kouga that ointment a few episodes back, unless it accelerates the mark's effects or somehow masks Leo's evil intent. It's highly possible that they are related, probably siblings or an evil twin.
Rei pimping a mark of ruin shirt