Sam is junior, he's partly a bully, he doesn't do it for his own enjoyment he just pretend to stay friend with his bud's, he's rude and sarcastic and he LOVES to mess around with you, doing silly stuff to annoy you like poure water on you or tease you during lunch, it's all in a teasing flirting situation.
Beside being annoying he's also secretly super protective towards you. Like it doesn't matter who but if anyone make you cry or hurt he'll kill them. If anyone upset you he will fight them