Someone related to Mokou? 'Cause she's already there between Tewi and Keine. But I wouldn't cancel out any ideas so fast... I mean, I'm pretty sure I'm seeing a hand coming out of the back of that white-haired guy's head and holding the Mokou look-alike's hand.
The guy is getting his ear tugged by the girl with long, greenish(?) hair and Mokou's seal-bows....and what looks like a green version of Kaguya's kimono....
......I'd almost think that's some combination of (Ex)Keine, Kaguya and Mokou, but that's impossible on several levels barring judicious use of the Fusion Dance.
The guy definitely looks sorta like Rinnosuke in a kind of ninja swordsman outfit though...
tehSandwich said: The hell's on the far right? Some guy and... Mokou?!
At the risk of replying to an almost year old post, I'd guess that the two people on the far right are Mokou's father and mother, which can kinda be suported by the fact that Komachi is there. Maybe she hasn't ferried them yet or something.