Well, I prefer Kotone survives the accident. Your call how exactly, one way we could rul spending all AP (my own house rule) allows you survive a deadly attack and just get stabilized to -9 HP. But even then person is hospitalized for months from said such attack as it also empties chakra pool to zero.<br/><br/>So, when Tashi does his attack Kotone's comrades think he just one shot her and he practically did. But some miracle (AP granted) she survives but she may have suffered indeed permanent injuries which hinder her duties as ninja.<br/><br/>What comes to Red Eyes activation; your the GM but I agree a intense anger along with bloodshed brutality can trigger it (or is at least one methods). Most cases the anger consumes the invindual entirely in the berserk but in Tashi's case he has true eyes; which means his eyes become permanently charged with red chakra and besides brutality of his attack Kotone's pals could see his eyes and sense how outright his essence exploded enormous levels. Basically frightening scary levels and they may have zero info about Mibu clan but they may freak out from experience.<br/><br/>Overall I thinked this triggered some accident which caused some political squabbling but because Kotone did not die (and it was Kotone's team who started the taunting match and if squeezed out from them the details they learn Tashi did warn them back off before he thinks they are there to do more than annoy them). Also in Tashi's end they tell as Mibu he would not had attacked if the other team had not started draw blood; as that is unwritten rule among Mibu clan if any other clan sheds blood from genin or villager from village which they guard; it's kiddy gloves off and permission to kill.<br/><br/>I just point out the needles did indeed draw blood and poison gass cloud is not something what is used even in prank.<br/><br/>But above is just musing but shortly said; I let you decide how Kotone goes just dying state but she definitely gets nailed hard by the attack and is likely hospitalized for weeks if not months.<br/><br/>Also combined effort of high level ninjutsu and also Tashi's bloodline awakened roaring chakra aura would alarm both Maki and Keiji that something is going on. Maki would recognize it's Tashi's essence but it's simply a much more fierce and stronger. if compare before his chakra was just gently glowing candle but it exploded to blaze of a torch which crackles by angry flames.