Lucius Ego is one of Jaime's protectors, perhaps the most powerful. He went to earth to protect Jaime as a result of an oath he made with Queen Xandra. Being half Ondalan, Lucius has the ability to turn himself into a flying, fire-breathing dragon at will. At first Lucius sometimes found himself at odds with Diamond, who did not trust him, and Tommy, who did not like him. Nevertheless, Lucius's fierce sense of honor and pride are what keep him dedicated to fulfilling his promise to Queen Xandra to take care of her daughter.
Lucius Ego is the crown prince of Ondala, a planet of shape-shifting people-dragons like himself. His uncle and his cousin on Ondala assassinated his parents and to frame Lucius for their deaths. Lucius then slew his treacherous uncle and cousin, but without proof of their treason to give to the Ondalan High Council, he was exiled to the Ondalan badlands. Lucius eventually escaped the badlands only to find that his suspected guilt was believed by even his close friends.
Lucius intends to return to Ondala with the proof he needs to exonerate himself, and to reclaim his throne. Until then he protects Jaime, and helps her to learn how to tap into and use her powers