This type of Bugrom has a special purpose. While the other, larger Bugrom often
assist in construction or battle, these smaller Bugrom seem to serve the purpose
of flying between various units and relaying information.
Also, due to their size, they can also help espionage efforts by spying on others unnoticed or scouting ahead and then relaying what is learned to unit commanders. These talking carrier pigeons are quite useful to Jinnai's efforts.