Tachihara is a young man with short, spiky hair dyed rust-red and amber eyes. He has a Band-Aid on the bridge of his nose. His natural hair color is black. At first glance, Tachihara is an arrogant personality, more than willing to solve problems with brute force and his dual weapons. A quick temper leads to frequent conflicts. Despite his rough appearance, Tachihara is able to think rationally and lovingly and sweetly treat his girlfriend and family.