I haven't gotten around to making a koro yet, I probably should. I have one of Minato (Well they changed it to Makoto for the movie).
As for Koro's arm band maybe they glued it on or it's held on by some gum.
You'll have to forgive me...I'm not quite human yet. Actually...I'm not human at all
AWA - 2015
Momo Con - 2015
Dragon*Con - 2015