According to Greek Mythology, Ladon was a dragon that never slept and guarded the tree in the Garden of the Hesperides and guarded the golden apples. He was overcome by Heracles. The following day, Jason and the Argonauts passed by on their chthonic return journey from Colchis and heard the lament of "shining" Aegle, one of the four Hesperides, and viewed the still-twitching Ladon. Ladon dies with Aegle by his side.
Now, The original Ladon from Greek Mythology was hundred-headed, serpent-like dragon that twined and twisted around the tree. I was not about to do this. So, I took the liberty of making him my own character. More Western dragon like.