Letus
Title
God of Death
Lieutenant of Pluto
Vital Statistics
Gender	Male
Family	Scotus (father) Nox (mother) Somnus (twin brother) Charon, Senectus and Fatum (brothers) Pasithea (sister-in-law) Somnia (nephew) Discordia, Invidia, and Dies (sisters)
Status	Immortal
Eye Color	Any color
Hair Color	Any color
Height	Any height
Other
Affiliation	Roman Olympians Pluto
Weapons	None
Species	God
Home	Unknown
Greek/Roman form	Thanatos (Greek)
Appearances	The Son of Neptune
Actor	None
Quests	None

Letus (also known as Mors) is the Roman counterpart of Thanatos. He is the god of Death, the Lieutenant of Pluto and Reaper of Souls. 

The Heroes of Olympus

The Son of Neptune

When Mars appeared and claimed Frank Zhang as his son after the war games, he said that Death had been captured and issued a quest. He ordered that his son would lead the quest to save Death, and Frank Zhang chose Percy Jackson and Hazel Levesque to go on the quest with him. 

The three demigods found Letus in his Greek form in Alaska where he is bound in chains of ice. While Hazel Levesque and Percy Jackson were fighting Alcyoneus and the giants' minions, Frank Zhang burned the wood that carries Frank's life. After he has been released from his bonds he gives the trio information about the Doors of Death which he refers to as 'The Doors of Me.'