Long story short could animate undead create say a swarm of locust into undead?

Considering an interesting flavour idea and this could be the simplest way. An undead necromancer(Eleti race from mythic races) mimicking life through a mask that can express emotions that is more or less mechanisms directed and controlled by the swarm behind the mask. It may seem bizarre to anyone looking sure but better to have slow responces than look like a skeleton. Just an idea i had and no idea if you could even animate a swarm. The mask would be a goal to have made but useless without a 'power source'.