Armin understood Hange’s want to retire after the curse of Ymir had been broken, but he also couldn’t help but be a little ticked that he was stuck helping the cadets with their winter training now- especially when it was snowing so hard and that made the surroundings barely visible. Eren was out, Mikasa was busy, everyone else was also out and busy or too sick to help with training, so Armin was stuck, alone, making sure they got to the cabins safely.