Linda Fourth-grade girlfriend of "O'Brien." They saw a war movie on a date. She died from a brain tumor. Hers was the first dead body "O'Brien" saw.
Timmy Fourth-grade persona of "Tim O'Brien" who felt a "deep and rich…love" for Linda.
Nick Veenhof Fourth-grade classmate of "O'Brien" and Linda who, being a prankster, pulls Linda's hat off, revealing her bald head and surgery scars.
Lemon's sister Curt Lemon's sister, who did not respond to Kiley's letter about her brother's death because, presumably, she found the letter's content disturbing and inappropriate.
Martha Lt. Cross's love interest; he keeps her picture with him in Vietnam. She does not return his feelings. "O'Brien" suggests that she has a secret, possibly that she had been raped. She becomes a Lutheran missionary and does not want to be married.
