Shin and Kotetsu are a pair of distinctive kunai knives with a cel-shaded anime aesthetic, featuring sleek, angular designs with sharp, pointed tips and curved edges for dynamic combat visuals. The blades are polished metal with a slight glow to emphasize their sharpness, while the handles are wrapped in dark fabric for grip, adorned with subtle engravings that reflect their ninja origins. Their proportions are balanced for throwing and melee use, with a medium length that makes them versatile in battle.