Chronos (クロノス, Kuronosu) is the God of Time. He fights Kido Saori and the Bronze Saints. In Saint Seiya: Next Dimension, Artemis explains that she and Apollo watch over Time, but none of the Olympians have power over Time. She also states that Chronos transcends the Olympians but has no real form.
Chronos's first appearance in Next Dimension is in Chapter 16. He is also featured as a character in Saint Seiya: The Lost Canvas and Saint Seiya: The Lost Canvas Gaiden.