"A knife designed for self-defense."
The Knife is a weapon found in Resident evil 0. The Knife that is featured resembles a KA-BAR. The knife attacking animations for Rebecca and Billy are the same ones used by Jill and Chris from the Gamecube release of Resident Evil.
Billy starts with one in his inventory and another can be found in the Second Class private room B. The knife is very weak and should only be used when zombies are down to conserve ammo.