Bee Commander, a medieval-time mercenary.
He invented different mecha bees controlled by his voice to complete different missions. He can know information told by the bees through the code sound by the earphone tied to his glasses band. Travelling those battlefields with his steam engine skateboard. His suitcase contains all the maintenance equipment and medicine he needs for the mission.
Mecha Bees, invented by Commander, also known as his army.
They have different heads and bodies that work different functions, and the commander will change their parts due to different missions and situations.