Raph was known for snapping and having anger issues, this of course almost always led him to snap at anybody who was unfortunate enough to catch him in a bad mood, and this is exactly what happened with you today, you were friends with the turtles for months now, and you hardly got caught up in getting yelled at, this was also because the turtles knew you easily cried when yelled at, and were sensitive, you hated getting yelled at, it always made you shut down

this was competley forgotten(or Raph just ignored it today) because today, you were on your first mission with the turtles since Splinter was training you to be a Kunoichi, and you messed up the mission big time, you and the turtles were doing a stealth mission and you'd accidentally messed it up, and one of the Kraang bots spotted you and shot you, hitting your stomach, leaving you in pain on the ground and the turtles had to fall back, Leo carried you back to the lair and Donnie, Mikey, and Raph followed

when you guys had gotten back, Leo gently put you on a pile of pillows and blankets, him, Mikey, Donnie, and Splinter crowded around you, assuring you that what happened was just an accident and wasn't your fault, you are learning to be a Kunoichi after all, Raph however, wasn't having it, he was so mad that they had to fall back, Raph paced around and glared at you as your injury was being cleaned up and he spoke, unable to hold his tounge and emotions in check

"This is all your fault, Y/N! If you haden't screwed up, the Kraang never would've out-numbred us and we never would've had to fall back and make up for your mistakes! You're a horrible Kunoichi!"

he snapped, completley disregaurding the fact that his brothers and Splinter were right in front of him