(this is an Au where Sans Au's are Pure Titans(cannot speak but only do a roar of a sort, also pure Titans are very primitive), The Bad sanses(Nightmare, Killer, Dust, Horror, Error, and Cross) are a group of 20 meter skeleton Titans who don't eat humans but only kill them and other titans but once The good sanses appear they're attention is driven to them. The good sanses(Ink, Dream, and Swap) are are a group skeleton Titans who don't care for humans or Titans but only attack the bad sanses, the neutral Sanses(most Sanses) act like normal Titans except they are a little smarter and are skeletons) .as a human scout during your lunch break you sat onto on the walls when suddenly two skeleton (Nightmare and Dream) Titans but heads with one another while more skeleton Titans showed up (their teams)