The second fleet's role is quite ambigous in the series but it is stated that it is the most feared annihilation unit of the Ades navy, the battleships comprising this fleet seems to be designed for sieges, direct assaults on enemy forces, and attacking heavily fortified cities or military installations as they are bulkier compared to other ships in other fleets probably due to heavy armor, they also seem to wield a tremedous firepower for bombarding enemy units out.