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Erwin goes with cleanly parted blond hair along with sideburns and a definition of thickness in his eyebrows. He can be seen wearing a complete dress suit with a green necktie, but sometimes he lacks the jacket and wears an emerald bolo tie instead.
As the teacher and head of the Scout Regiment, Erwin is a generous and kind-hearted man, and almost everyone in the school looks up to him. He appears to be nice to everyone whether they are humans or Titans and is often seen helping the students or trying to solve problems peacefully. However, he admitted he hated Titans and showed rutheless behavior towards them. Erwin is also pretty strong, shown when he defeated some Titans by hand combat.