Jeremy Sullivan was born and raised in Cork, to a relatively normal muggle family. He is the middle child, with an older brother and younger sister, though he is the only of of the three that has shown any magical ability thus far. Very much fitting the bill of a middle child, Jeremy is no stranger to entertaining himself as he often feels ignored or out of place. Though this might sound like a bad thing to most, the young boy would find enjoyment in playing by himself, often times using his vivid imagination to put him in a multitude of scenarios where he made himself out to be the hero of his own story. He has a slightly lithe build, and is of above average height, his eyes are greenish-brown, and his hair is untamed, with a reddish tint, and his face is dotted with random freckles.

Even though he found it fun to play games by himself a lot of times, he was not without friends, often getting together to ride bikes, play video games, or pick up games of football at the park. Jeremy is also a fan of structure, as he is not often the one do things "on a whim", as he likes to plan and have a clear schedule of things to come.

When he was around 8 years old is when his magic surfaced. After a fight with his older brother, he isolated himself in his room. After a while, and still a bit angry, he began to play with the toys in his room, yet again imagining himself as the hero of the story, and his older brother was obviously the villain. Unknown to him at the time, one of the toys in his room, a hotwheels car, began to levitate on it own. His door slightly cracked, the toy whizzed from the room and hit his brother square on the back of his head. At the time it was believed Jeremy threw the toy car at his brother in anger, but Jeremy secretly knew that was not the case.