Encyclopedia Barsoomia Wiki
The information in this article comes from Marvels, warlord of mars and is not written by Edgar Rice Burroughs.

Gargan was a red martian guard in the service of the council of five, he was assigned to guard Dejah thoris while she was in the councils custody. He apparently had to keep Krela from beating her. Gargan was a soldier in the service of helium before he served the council, Mors Kajak appearently thought he had the makings of a great warrior, but he was head-strong and refused order and was eventually thrown out of Heliums army. Gargan tried to force himself onto Dejah Thoris, she killed him for the transgression!