Thanatos is the God of death in Greek mythology and like any God with the title he is also a Physcopum but, Hermes is the God that is tasked with collecting all newly deceased soul and taking them to the river Styx where they are Faried across by karon as long as they can pay his fee. So yeah Hermes is literally the gather of soul in Greek mythos while thanatos is the one who decides if your time is up and you are ready to move on to the afterlife.
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