Jarvis was a camp counselor at Camp Sapphire Lagoon, and was the sole survivor of Jonas's onslaught on the island. He was the one who had killed Jonas in the past, and did such a number on him that by the time the Grim Reaper came for his soul, his face was unrecognisable, and left his machete wedged in the middle of his face.
Due to his involvement in trapping Jonas, he was given a gravestone marked with the letter "J" and a scroll with the number 17 with bloody harpoon at the Lumbridge graveyard.
- Jarvis Thompson is based on the character Tommy Jarvis who appears in three of the twelve Friday the 13th films.
- The harpoon that is resting on the gravestone is the same harpoon that Jonas used.
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