Zachary is an old man, having gray hair, thick mustache, and a beard connected to his sideburns. He wears round-shaped glasses, a plain white shirt and brown pants with suspenders.
As the school principal in the human campus, Zachary attends the first years' entrance ceremony.
Following the election for a new student council president, Zachary is present for the candidates' final speeches.
After Titans appear and steal all of the festival food stands, Eren Jaeger tries to head to their building to retrieve his cheeseburgers, and the teachers stand in his way, with Zachary reminding Eren that he had pledged his life to upholding the school rules. Zachary later attends a meeting with other teachers to discuss the situation subsequent to Eren's successful attempt.