Hillary Sunnyvale was a beautiful young model. She wanted to become professional and had many portfolios. One day, Hillary met Eli Solace who was actually Tonatiuh in disguise at a coffee shop. Eli and Hillary eventually fell in love with each other after discussing lots about Hillary's future. Tonatiuh managed to get her signed at a French modeling agency. Hillary was shocked by this offer. Before Tonatiuh left, Hillary was pregnant after having consummated their love. He also gave Hillary a letter about how their son was a demigod and how to get him to Camp Aztlan.
Hillary was able to take a break from modelling during these years. After Hillary was around Europe but no one was there to take care of her newborn son, Rhett. Hillary decided to leave the child to her parents. Margeret and Gary Sunnyvale were nice enough to keep the child with them. Despite all of this, Rhett never managed to live a happy life. This was due to the fact that he was diagnosed with dyslexia and ADHD was not really helping him. At school, he was called a freak and had enough fights and detentions. School after school, Rhett was expelled.
Rhett was constantly ridiculed by his peers. He managed to control his anger through several anger management therapies given to him by his grandparents. Rhett managed to control his anger but his fellow students would still hate on him. He managed to survive the whole middle school while trying to control his borderline depression. At the age of 14, he was attacked by his first monster, an Ahuizotl. It chased him down the hall. The Ahuizotl disappeared however into a pile of golden ashes. Rhett never spoke of this again.
Later on, Rhett began to take up drawing and painting as his hobbies. He also began to photograph and write to ignore his minds off his haters. Continuing with a trend of being nearly killed, he was finally rescued by an adult demigod who explained to him his origins. However, Rhett refused to believe this stranger because he was a bit scared that he just came out of nowhere and rescued him. Later that week, Hillary, his mother came back. By now, Hillary was one of the well-paid models in the whole world. Hillary soon began to talk to Rhett about who he really was. He was a demigod. Even his mother is crazy, Rhett decided to go with her to Camp Aztlan.
Later that night, the plane took off to New Mexico where Camp Aztlan resided. Following the map given by the sun god himself, Rhett arrived at the City of Tollan where he was claimed by Tonatiuh. He was surprised and his mother told him to stay here and train. Later the week, he found a sword in his room from Tonatiuh.
Children of Tonatiuh in rare cases are able to mimic the power of the sun. They become pure light and fire increased with light and burning everything he/she touches. They can unleash fireballs at will. However, once the user changes back, they are completely immobile and defenseless for a long time.
Tonatiuh's children are very aware and are capable of sensing illusions.
Rhett appears to be very cold and distant but when you get to know him you see a warmer side of him. His cold personality is mostly due to his friendless background and being lonely. He enjoys being with friends. He rarely shows emotions because he is scared that people would laugh at him for it. His warmer side usually appears with the people he's closest to.