"In other words, the carriers are like cargo trucks hauling souls to Algon Soft's main server."
Carriers are entities from Devil Summoner: Soul Hackers
The Carriers are a strange bug-like entity produced by Manitou's Spores. They are implanted in the Krypto Chips by the Phantom Society and Algon Soft with the goal of taking human souls and transporting them through Paradigm X. Then they would take the souls to the Manitou Net to give the souls to Manitou.