[Shock hits him first, a cacophony of disbelief and terror unlike anything he's ever known. Even that fateful battle hundreds of years ago had been a battle; in that context some level of betrayal was expected, but not during an innocent conversation with a friend, not here.
Utsusemimaru has no time to consider the significance of all of this, because the pain follows quickly after, tearing through his abdomen. He makes a choked sound in his throat and stares up at Stiles's face while his own rapidly loses color.]