Demon slayer >_<

You were sitting in a tree staring off into space until you heard chattering from below you looked down to see what looked like 3 slayers, 2 we're arguing and 1 was trying to make them calm down, until you sensed something.. another demon... on the red haired boys back was a box, is where it was coming from.. 'how interesting..' you thought, you waited for the right moment to strike.. (YOU DO THE REST)