Hanzou

In "Pico's School"(Newgrounds.com game made by site creator Tom Fulp in 1999), Hanzou can be found inside the girl's bathroom, killing anybody who runs in. After encountering Pico, Hanzou gives a speech about being a true ninja and the fight begins. During the battle, the bathroom's lights turn off and Pico must fight Hanzou as they attack with their sword in the dark. Only the light from Hanzou's night vision goggles can be seen, which Pico must use to know where to shoot. Once killed, Hanzou's head is sliced off their body, and they drop their night vision goggles.