Named after his paternal grandfather and the Greek God of Death, Thanatos is the product of a secret union between a lower clan member and one of Maelstrom's harem.

When Maelstrom realized this, he was enraged and decided to punish the hatchling by assigning him to the task of tending to those who were in the Deep. However, this "punishment" was exactly what Thanatos was looking for, and he soon found himself enjoying the job.

He and his companion Muninn wander the halls of the Deep, checking on those hibernating and the sickly being quarantined from the rest of the clan. It brings him fulfillment to be able to serve his clanmates in this way, being their source of comfort and even being there for them in their last moments. Both of his parents are very, very proud of him.