Blast Hornet is a minor antagonist from Megaman X3. He is a Reploid who was a former hoodlum but after an encounter with famous Maverick Hunter Zero, he was enlisted to join the ranks in the 0 Unit. Time had passed and once Dr. Doppler created his utopia, Hornet went instead of Zero but was infected by the Maverick virus and now serves Doppler. He now protects a weapons factory that's under the army's control.

He is modeled after a queen hornet, having humanoid limbs, torso and head with a transparent hornet abdomen that carries mini robotic hornets. His body is black and yellow striped, his face has his mouth covered by a round vent filter and he even had long hornet antennae. His right arm is in place of a blue and white arm cannon. On his back are long transparent bug wings.

He relies on agility just like a hornet for combat. Not only does he make use of a stinger build into his transparent abdomen but he uses the same abdomen to unleash numerous miniature hornets that can lock on to the target with Parasitic Bomb, they even explode on contact.