Born to a large family of Irish Catholics in Ireland, Sebastian began life in a tough world that only got tougher. This wasn't to say that the St. George line actually began in Ireland. It's simply that at some point, a Catholic man from England decided to marry a beautiful Irish Catholic lass in the past, and they settled in Ireland. Until Tam St.George moved to the United States and settled THERE much later on, that is.
Sebastian is the seventh son of his father, Tam, and his mother, Cathleen. Tam himself is a seventh son. There were babies after Baz's birth for a total of eleven. To make matters worse, his mother named them all after Catholic saints and angels. Sebastian was a studious and quiet child, angelic really, growing up. That didn't keep them from loss: his older brother, Lucian, vanished when Sebastian was eight. Lucian went off to Africa as part of his religious training and never returned. It fell on their brother, Aidan, to help take up the slack. Aidan was at times merciless in his taunting and outright abusive of his siblings, Sebastian especially, for no other reason than he stood up for the others. Tam and Cathleen, almost never around due to work, would often snap at them to "Handle it yourselves." Sebastian was ten by the time Aidan left home, but by then it was too late. He would grow to have a strained relationship with his siblings and parents.
When he was nine, his father got a job in America and they all moved there. He found it hard to settle in until the day he met Miranda, who would become his best friend and more later on. He was known to stand up at school to bullies, but it backfired the summer just after his thirteenth birthday; he got jumped. Sebastian, having wanted to become a doctor when he grew up, suddenly withdrew from that area. He started taking self-defense lessons that he paid for monthly by using his daily lunch money and helping out around the dojo after school. Miranda, knowing his love of Jimi Hendrix, gave him his first old, hand-me-down acoustic guitar for Christmas when they were twelve, and he had played it and learned it on his own in another year. Sebastian owned every record that Hendrix had ever put out by the time he was thirteen and bought a second-hand electric guitar to play. Rock was his genre of choice, and it soon colored his entire worldview.
But thirteen was also a year of change. He began dating Miranda, and was finally happy with the way his life was going. But with the onset of puberty, he discovered he wasn't normal: he had the power to vocally mimic anything he heard, natural or otherwise. Unable to ignore it after a year or so, he finally told his parents. His father didn't believe him, but his mother revealed a secret at that point: she had powers as well. Some of his brothers too. Lucian had been one of them back when they were still in Ireland, using his gift hand in hand with his faith - and he had been after a cruel man in Africa when he vanished, presumed dead. Others of his family had shown their gifts to their mother: Atticus could speak to animals, Cianan could de-molecularize and re-molecularize objects, and so forth. It apparently hadn't been all of the brood, however, and so Cathleen had been careful to keep it from her husband and the other kids. Sebastian would have to learn how to control his gift, despite his humble birth.
Despite the trials and tribulations of living in New York City as a teenager, especially one with a gift that made him abnormal, Sebastian managed to survive. Miranda and he had their fights and on again, off again, relationship until post-graduation. When she discovered his ability, quite accidentally, she surprised him by being accepting of it after a short period. Sebastian joined the NYC Police force soon after his graduation from high school, and Miranda worked at a local diner while saving up to start college. In the meantime, his focus shifted from simple karate and ju-jitsu to more violent, harder forms of martial arts: that of banshay and bando. The instructor was a man from Malaysia (Burma) who knew the arts well. One was more defensive, but the other managed to help Baz learn to use various weapons - and even things not usually thought to be weapons - with lethal force if necessary.
He and Miranda lived together for a couple more years before Sebastian bought a ring for her. The day that he took her out to propose at dinner was the last day he would have her in his life. A random encounter on the way home down the block pitted him against another, unknown, Evolved and an accomplice. Miranda died trying to save Sebastian, and took the brunt of the power-boosted telekinetic hit. All the same, it nearly severed him in two as well as killing her, and all he could do was use his mimicry to get someone to call for help as he lay dying. He was saved two days short of his 23rd birthday - the same day, ironically, that his namesake Saint had been brutally martyred.
The aftermath for him was devastating. Miranda had been the rock he based much of his life off of. Within another two years, he had left the force due to his loss interfering with his work. He focused much more on his music, creating a band at that point and getting into alcohol and occasional drug use to dull his pain. When they were discovered and signed to a label, they began to tour as the opening act for other, larger bands - until they became that larger band themselves.
It all changed the day of The Bomb. He and the band had been flying into JFK for a return visit full of concerts and parties and interviews when the center of the city virtually blew up. They saw the mushroom cloud from their windows in the private jet as they were re-directed several minutes away. That day, and then in the ensuing months, they lost most of their family that lived in the bomb's epicenter and out to the irradiated sections. For Sebastian, it was his mother and father, given the rest of his siblings had long since grown up and moved away. For the others in the band, it was most of their families. The fallout of this event left them stranded in Secaucus, New Jersey, until they could make their way towards Union City and the nearby Lincoln Tunnel - and it was there, they could go no further. Communication was down, and no amount of money could possibly help them find their families for several months. In the meantime, the entire country, even the world, had begun to suffer from the economic destruction of a major hub of business.
Baz and his band refused to tour during these long months, and tried to help as best they could where they could. In February of the next year, the Evolved were outed by Nathan Petrelli. Feeling a distinct target on his back, Sebastian kept his head down and kept silent about his ability. Once reunited with his remaining family, and his band's, he figured things would settle down and they would begin their touring once again. He was wrong. Nothing was as it seemed any longer, and many of their venues could hardly afford to support them. His income dropped dramatically, and he had to downgrade in order to save himself.
The band hasn't split up, but he now makes his home on the outskirts of New York City - both because he wants to help the place and because he grew up there. Now that things are settled, he feels that his secret ability will remain that way - and given the climate of hate that has sprung up around the idea of the Evolved, he's finding himself more and more willing to do anything to protect that secret he has, lest it cost him his livelihood.
