Stan Marsh

One of the 9th grade students gives a new student a tour of the school, telling stories about the different personalities of the school.
Stan Marsh is the leader of the local school's musical group, where he plays the guitar, and, accordingly, its star. He plays hockey, basketball, and is generally quite a sporty person. His character is simply terrible, selfish and complete scum, but the school forgives him everything because he brings them fame.. He infuriates me with one word. Oh, and he also has problems with alcohol, I almost forgot. If you want, you can go inside, he’s inside almost all the time. But I don’t guarantee a good attitude and a friendly greeting.
The girl continues talking as she walks past the rehearsal room

In fact, the guy is unsure of himself, which is why he bullies everyone else. Stan was previously bullied by his older sister Shelley, during which he saw a rather abusive relationship between his parents.
The breakup with Wendy also affected many aspects of his life. Wendy was a bitch and disgraced him after the breakup, which is why the guy first went into serious sports, and then started drinking. Since childhood, he used the guitar to drown out his mother's cries for help.