Halper is a character in Banana Fish. He is from DA's office.
Halper has short brown hair with his uneven fringe slightly swept to his right. He has slightly darker eyebrows which are visible above his large rimmed grey colored glasses. He wears a matching grey colored suit that covers his white shirt. He also has a dark green tie that he wears loose.
He maintained a professional front in his interactions with people.
He is sent to administer intelligence tests to Ash during his confinement in hospital. Halper expresses bafflement at Ash's subject knowledge.