It's ok that I send people to hell because I'm punishing them for their crimes.
I heard his wife just left him.
Why is our nasty teacher even meaner than usual?
Son... your mother and I can't lie to you anymore. Your hamster is dead.
Nope! He just ran away!! He's an independent man now! Be free, my beloved pet!
Satan is rationalizing his evil behavior of torturing by saying he's actually doing a good deed. He's trying to see it as enforcing the law and punishing bad people for their crimes to make what he's doing seem okay in his eyes.
Hi!! Tracy!!! It's SO good to see you!!
This teacher is going through a lot of emotional turmoil due to his new relationship status. He is projecting his pain on to the students that he teaches, who are entirely unrelated to the problem. Unleashing his negative feelings onto his students is projection.
The father in this situation is trying to tell his son the cold hard truth: that his hamster did not run away but is actually dead. The son denies what the father is saying in order to avoid having to deal with his emotions.
The brown haired character is showing great enthusiasm at seeing Tracy, but inwardly she despises her. She makes a point of demonstrating her eagerness to see Tracy as a way to mask up the hatred she feels.
This boy is channeling his internal aggressiveness into listening to angry music. Listening to music is a more socially acceptable way to channel rage.