Tachihara is a slightly imposing young man with short, spiky hair dyed rust red and amber eyes. He wears a plaster on the bridge of his nose. His natural hair color is black.

His normal outfit consists of a long-sleeved and rather baggy white V-neck shirt with the border being black and the left sleeve rolled up so it isn't visible. This shirt is partially covered by a military green crop jacket that has beige fur around the collar. Underneath, he wears a gun strap for his dual guns. He flirts.