|Cleo Carleson, a daughter of Hecate, was swimming at the beach one day when she got muscle cramps. She began sinking in the water because she couldn't move her legs. She tried using her arms alone, but it didn't do much help. As her hope of living any further faded and fell unconscious, someone held her in the hand and brought her back to the shoreline. It was Palaemon, disguised as a muscular surfer expert in the area. He introduced himself as Baron and assisted her in her situation. Cleo said it was okay so he left her under her rainbow-colored umbrella. But before that, Cleo thanked him for saving her. Baron silently nodded and left.
A week after the incident, they bumped into each other in a mall and felt nostalgic. Baron treated her to a cafe' as a "you're welcome gift". There they got to know each other and became fast friends. They started seeing each other and hang out and eventually became an official couple.
During their fourth monthsary, they had an affair when Cleo invited Baron to their house to have a movie marathon, specifically chick flicks. Upon finding out that Cleo was pregnant, Baron left them mysteriously, leaving a note that he was actually Palaemon, Greek god of sharks and harbors. She felt less sadness, as she already had another demigod with her: Danu, a daughter of Hypnos. After giving birth to Marvel, she had an affair yet with another god: Thanatos. There, she gave birth to Nolee Carleson. She received news from her relatives that they also had demigods as children.
When the children were very young their parents decided to split them up for safety. They decided they would each take their own children and move away from eachother. They made this decision to keep them safe. The parents did not want to lose their kids, so they decided not to send them to Camp. The family gave their hugs and said their goodbyes and went their separate ways, trying to get as far away from each other as possible.
Along with Danu and Nolee, Marvel was taken to Dublin, Ireland where they all grew up pretty safe. Marvel was the rebellious type in the three of them, which resulted to troubles that caused Cleo headaches and Danu and Nolee to avoid him in fear that they might get hooked in his doings. He wanted things his way, both at home and school, which made him alienated and ignored. But in spite of that, he wanted to help out, even if he is a total klutz. But instead, this made him even more alienated. With his dyslexia and ADHD, his schoolmates disliked him and teased him as very stupid and peabrained. But Marvel didn't mind them. He just continued on with his life. He was the least known member in his branch of the family, because of his questionable reputation. Growing up was hard because of his personality, but he didn't care. Hard or not, its his life, not theirs.
After many years, the family decided that it was time they came back together. They sent out letters and invited everyone. When they came together they were having a fun time. They were telling each other stories about their lives, jokes, and playing around. It did not stay happy for long, when a crazy lady came running from trees screaming and tripping every once in a while. The lady ran towards the family and started to attack Matieus. Tora ran up to them and pushed the woman off who then attacked Tora. The lady killed Tora and then it seemed like she came to her senses and she ran away. The family was shaken up and did not know what to do about Tora and Matieus. To make matters worse a group of Scythian Dracanae came out of the trees and started to attack. The adults started to fight them off with weapons that had morphed from watches, rings, and pens, but the kids had no idea what to do. The adults were holding them off but not doing much. A shadow then passed over head. Above them were Pegasi! When they landed teenagers jumped off and started to fight. After about 10 minutes there were many piles of golden dust. The teenagers told the kids they needed to get to Camp Half-Blood. So they took them to camp were they were now reside. They found out that the woman who attacked them was Maya Jenson, a past camper.
Upon arriving into camp, he was claimed by his father, Palaemon.