Caelan

Caelan is a vampire in Skulduggery Pleasant and is a friendly character until the very end of Death Bringer.

At the end of Death Bringer, Valkyrie decides to dump Caelan but he was angry and transformed into his vampire form and attacked. Fletcher appeared and rescued Valkyrie before attacking Caelan, Caelan managed to knock Fletcher unconsious and chased Valkyrie who managed to push Caelan into the salt water, which will kill a vampire and he died.