Here are some of the negative things *about* Kronos, *as depicted in the series*, that are relevant to *Lightning Thief*:
* He orchestrated the escape of the Titans: This sets the whole plot in motion. His escape from Tartarus throws the world into chaos and threatens the safety of Olympus.
* He seeks to overthrow Zeus and reclaim power: Kronos is driven by ambition and a desire for revenge. He wants to return to power and rule the world, which would bring untold suffering to both mortals and gods.
* He controls his children: Kronos imprisoned his children (the gods) within his own body, demonstrating his cruel and tyrannical nature. He uses his power to manipulate and control them, even after they escape, driving them to fight among themselves and weakening their collective strength.
* He is the source of fear and uncertainty: The threat of Kronos's return creates a sense of anxiety and dread throughout the series. His presence looms large over the characters, reminding them of the constant danger he poses.
* He is responsible for the war between the gods and Titans: This war is a major conflict that has shaped the world and created many of the challenges the characters face.
While Kronos isn't directly present in *Lightning Thief*, his influence is felt throughout the book. The characters are constantly aware of his threat, and their actions are often driven by the need to prevent his return to power.