Haruaki Azuma/Plot

Background
He was Border's first sniper, as well as Kizaki's, and Narasaka's mentor, as well as many others.

Rank Wars Arc
Azuma is first introduced in Chapter 34, as one of the B-Class Snipers helping Ken Satori to train and guide the Sniper Trainees.When Chika positions herself to shoot, she turns around to him, which puzzles him. He asks her what's the matter and she asks him if she needs to run after each shot, to which he replies she doesn't.