hmmm... this... is quite intriguing that for the first time i don't know wat to comment 'cuz i just wanna read on... quite a mean cliffhanger btw!!

my guess is ryo is da new guy. don't really have a guess on wot sho's role is to yoko, but perhaps some form of guardian, and yoko has the ability to create this world black or white...

ryo might be the dark force but might not know it yet... hahaa random guessing