Gatsu is a tall, muscular man who wields the 'Dragon Slayer', a zweihänder or 2 handed sword about 7' long and 12" wide at its base. Described as more of a table-sized slab of iron than a blade, the Dragon Slayer's massive size makes it the ideal weapon for slaying apostles of the God Hand.

Gatsu's left hand is prosthetic, a replacement for the one he lost when Griffith attempted to sacrifice him to the forces of Hell; it folds back to expose a hidden cannon within the wrist. Gatsu also carries throwing knives, miniature bombs, a dagger, and even a repeating crossbow that can be mounted onto his prosthetic. While not innately magical, Gatsu's sword, the Dragon Slayer, was recently shown to have become a cursed blade after killing so many Apostles; enabling it to kill creatures of a non-corporeal nature and even the members of the God Hand.