Sherry met Deimos when she was at Harvard. They became fast friends then best friends and at last, lovers. They had a strong relationship because they built their love from scratch as friends. This strong relationship led to Sherry and Deimos' affair one night. Upon knowing that Sherry is pregnant, Deimos left her without a trace. Sherry, who didn't knew about the incident, decided she was raped. As Sherry is living alone, she felt even more sadder when Deimos left her. She had no choice but to raise the unborn child by herself. Unfortunately, when she was giving birth, she didn't have enough strength and died while giving birth to Evergreen. Evergreen survived but her mother did not. The nurses went through Sherry's records and found out her family and contacted them about what happened to her and the child. They asked her grandparents - the ones who answered the call - to get her to take care of her as her mother was dead. Her grandparents, Vincent and Pauline brought her to their home at Philadelphia, Pennsylvania. They named her Evergreen after the evergreen tree at Sherry's grave in honor of their deceased daughter. Their way of living was simple but strict and taught her good manners as she grew up. At school, she radiated an aura of terror, which led to her being disliked by many of her classmates.
Things started to become strange when she reached the age of thirteen. She began to see things but she ignored them. She told this to her grandparents and they said it was nothing, just her eyes playing tricks on her. These "tricks" worsened as every year passed. She got attacked by different monsters - hellhounds, harpies and even a manticore - and by miracle when she was about to be attacked by the monster, it stops dead with an arrow pierced in it. She wondered who shot the arrow but never thought much about it as long as she lived. She lived those years with great caution and threat.
Finally, on her seventeenth birthday, she got attacked again: two hellhounds smelled her demigod blood. On her way from school, the hellhounds leaped out of the bushes and bared their teeth on her. She wasn't scared of them. but was threatened. She looked for an opening behind her and sprinted as fast as she could to lose them. She hid in a nearby glen and looked around cautiously for any sign of them. But suddenly she slipped on the damp soil and tumbled down the glen which was pretty steep. She bumped her head on a rock and fell unconscious.
Upon waking up, she felt her head painful but a soothing feeling countered it. She looked up and saw a satyr. She stood straight up in surprise and caution. The satyr introduced himself and explained things like what are the hellhounds are, how he sensed that she is demigod and who she really is. He also told her he was the one who killed the monsters who chased her back then. Evergreen was taught not to talk to strangers and listen to their bribes. But there was something with this guy. She felt as if she has to come with him. Her feelings overcame her strict way of life and eventually followed him to camp. Upon arriving, she was claimed by no other than her father, Deimos. Then she remembered about her grandparents, and became worried they were looking for her all the time she was away. She asked the satyr that accompanied her to take her to her home for a while to tell them she was okay. The satyr agreed so they set out for her home at Connecticut. Upon arriving, she and the satyr explained to her grandparents what happened. Her grandparents couldn't believe a single bit of their story but after many pleadings, they reluctantly agreed for the satyr to take her back and live there at Camp Half-Blood.