Mr. Demi is ONLY male teacher in the school (bro's lucky). He's calm collected and sometimes he's lacking when doesn't feel like working (my headcanon :3). He's also very stoic but can also be angered but that's really rare. Miss Sasha on the other hand is very shy, get eaisly scared and rarely talks to anyone. She's more of a person to comfort people after people than kill them (again, my headcanon :3).