One of Charlie’s first friends and his love interest, she is a senior who shares a close bond with him and is involved in The Rocky Horror Picture Show.

Charlie’s best friend other than Sam, he is Sam’s stepbrother and known for his humor, helping Charlie embrace his identity and passions.

A senior at the start, she shares a strained relationship with Charlie that evolves as she begins to confide in him.

Away at college for much of the novel, he holds an important place in Charlie’s thoughts and is someone Charlie looks up to despite their differences.

Sam’s best friend and a senior, she is initially abrasive toward Charlie but later dates him, showing interest in alternative cultures and ideas.

Charlie's late aunt, who had a troubled past and lived with his family before her death, leaving a lasting impact on him.

Charlie’s freshman English teacher who influences him by recommending books that help in his personal growth and encouraging him to engage actively with life.