Mayumi comes from a mid class family who works at runic mines, collecting various gemstones and runes used by the richer magi. Although this isn't the easiest job, and doesn't have the friendliest community around it, Mayumi was too playful as a child to notice anyway. She was a known figure amoung the friendlier folk such as shopkeeps and innkeepers. Even at age three, Mayumi would be found running about the town and through the mines, paying no particular attention to the danger of doing so alone. She just loved looking around, and exploring. In particular, she loved to go out at night, and tap a few stellar runes with mana to make them go of like sparklers in the night. Mayumi would go as far to gather certain types of runes to make her own firework show once a year.
It was on her sixth birthday that a strange man saw her set off her annual fireworks show. Impressed, the strange man approached her as soon as her parents and other stragglers seperated from her. Because of the relitive danger she puts herself in daily, nobody ever thinks to look out for her safety. He said that talents like hers were wasted on such displays, and gave her a star shaped crystal. Just as Mayumi touched the crystal however, it burst into a viberant white eruption, and created the star shaped mark on her right shoulder.
Ever since recieving the mark, Mayumi suddenly was able to cast minor magic that was never taught to her. She began to try using her newfound power daily, but because she didn't know what she was doing, there were a few mishaps. The worst of which, was when she tried to make a large crystal star appear, then launch it at a target board. She dropped the spell before the star launched, causing her to break a leg under the impact, and kill her pet bird who was with her at the time. Despite this, her legs did heal, and Mayumi promised not to practice magic alone anymore.
Since then, Mayumi caused her parents quite a bit of unneeded stress while supervising her. Between the property damage, and the occational physical injuries, Mayumi became a financial burden. One night, Mayumi's parent's had kept the discussions about what they were going to do just a bit too loudly. Mayumi woke up to their yelling. "Ever since her first birthday, that child has been nothing but trouble. Before she always self managed so well, I was just tricked into thinking kids were easy. Now the damned brat is going to ruin us. I wish we could just ship her off somewhere to get fixed." "Just complaining about it won't fix anything. That is our daughter, and if she hurts someone we are legally responsible for her actions. For right now lets just keep her happy till we find some other sucker to take her".
It was after this conversation that Mayumi came to realize she was a bother to others. She didn't blame herself, but she also didn't want to make anyone unhappy because of her. She grew up fairly independant of her parents, so no trust issues developed as far as friends go. However she began to feel more uncomfortable when around new people, something that doesn't go well with an exploration instinct. Even despite the newfound shyness, Mayumi was tenderhearted and adorable enough to recieve help from many travelers. This was fortunate, because she was still only seven, and never knew what dangers to prepare for. Without the kindness of passersby, she likely would likely not be around anymore.
But her luck doesn't end there, after many years on the road: taking up odd jobs, making friends, and searching for 'treasures'; a certain letter carried by the wind smacked her dead in the face. And I think we all know what happened next.