Kai; he's always angry but when something gets him REALLY pissed- like someone hurting Lloyd or Nya- his eyes will go red and his fire gets out of control; flying in whatever direction he flings his fists. So if he's moving around a lot trying to make a point, he may or may not burn the person he's trying to defend
Nya; she'll avoid everyone and anyone who tries to talk to her will get hit with water(other than Kai; he'll just get a book to the face). Even Wu is scared of her like this
Jay; his eyes light up and he'll cause a blackout if he gets too loud. The rest of the day is spent avoiding Jay until the power comes back on, which makes him act like nothing at all happened
Cole; angrily eats cake
Zane; his eyes will turn black and he gets way too loud, freezing anything and everything in front of him. Pix is the only one to calm him down, but Lloyd kinda does it too
Lloyd; everyone goes quiet when he's mad because he has the creepiest smile when he's pissed, it makes him look like Karma
Pixal; her eyes go dark and she ignored everyone except Nya when they're alone
Wu; at this point the ninja should be used to it but they sure as hell aren't. It's very subtle to most when he is and isn't angry but the ninja notice it quickly
Koko; the only time she's ever gotten angry was when she snapped at Wu for forcing these kids to fight when they obviously need more breaks than what he's giving them. He gets very surprised and is forced to apologize to the ninja who heard everything since the walls are so thin. Lloyd told the others that when she and Garmadon were together she wasn't allowed to be angry so this was new for all of them. Still, the resting after stare she gets after arguments worried all of them and keeps them quiet(like mother like son)