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Sydonius or Syd is the descendant of Sisyphus. He's 17 years of age. Before joining the titans he lived in Canada. He usually keeps to himself. Like his ancestor Syd has to continually repeat tasks everyday. His blood is cured to the touch and so he gives himself the antidote everyday. He's also diabetic so he has to eat at regular times as well as insulin shots.

Syd has blond hair and bright blue eyes. He stands at 5'8''. He usually wears a baggy dull red sweatshirt and pair of baggy blue jeans.

He doesn't go out for sports or social functions. Instead he reads and writes. Some of his favorite authors are: Shakespeare, Tolkien, Ancient Philosophers-Aristotle and Plato-and many more. Syd usually writes short stories and poetry. He enjoys walks in the park as well as watching the sun set.

Finding him was totally by accident since he usually keeps to himself. Cronus originally found him, fully knowing that his ancestor made trouble during his time. After denying Cronus he was of course attacked by him. He was then saved by Hermes and taken too the school. He slowly made friends with the titans but made no special connection, as of yet.