It all began with Katie Mitchell and Bethany Anderson.
Katie and Bethany met during a trip the Salem institute made to Europe. They were on Hogsmeade, when Bethany bumped into Katie. That day they became friends, but were separated due to Katie only being there for a trip. Katie returned to Salem, and Bethany continued her years in Hogwarts as a Ravenclaw. It was on their sixth year that Katie had had enough. She hadn't forgotten of Bethany. She asked her parents to transfer her to Hogwarts, knowing fully well that was where Bethany studied. Or at least she hoped she still did. Her parents were those kind of parents that preferred success and money over family, so it was easy for Katie to get transferred to Hogwarts. When she arrived, she was sorted into Slytherin, which she didn't mind. The day she finally found Bethany, she ended up nothing but a shell. Why, exactly? She was lip-locked with her boyfriend. As soon as she saw Katie, though, she pushed him away and tried running after her, but her boyfriend didn't exactly take it kindly.
Having taken this the wrong way, Katie desperately tried to head back to Salem, just to be stopped by her parents. They were finally rid of Katie, and they didn't want her back. It didn't matter, though, because a week later or so, they died. Quite brutally, might I add. They were tortured, and later burned to death because of some old rivalry with a gang leader. Long story short, the guy was found, got condemned to jail for life along with his goonies, and Katie passed her sixth and most of her seventh year in Hogwarts all depressed.
By the time they graduated, Katie and Bethany had already talked and sorted things through. It came to light that Bethany's ex hurt her multiple times, and so he was expelled a week before their seventh year Christmas break. Years had passed of Katie and Bethany dating, when they finally got married. Instead of getting the help of science, they'd decided to adopt, and so the Mitchell-Anderson family grew. Many years and kids later, they finally decided to get the help if science and have a kid of their own. Nine months later, Sophia Mitchell-Anderson and Theodore Mitchell-Anderson were born.
A year after their birth, the married couple decided to continue adopting, their love of kids being too big. It wasn't a problem, though, considering they had the help of their eldest kids.
Órfhlaith Toiréasa Ó Cléirigh was conceived accidentally by a Muggle man, Diarmuid Ó Cléirigh, and a Witch, Isibéal Callaghan. The pair were friends with benefits and were careful to use protection but somehow, somehow, Orfhlaith came to be. The pair was worried. How did that happen? Deciding to pity the unwanted child, the woman carried the young baby for 9 months. After giving birth to the child, the pair spared no second glances at the child and quickly gave it a name, Órfhlaith Toiréasa, before dropping her off somewhere with a note attached on the basket. After the whole fiasco, the pair broke it off.
Meanwhile, someone had picked up the young child. It was a Muggle orphanage employee, who took pity on the babe and took her to the orphanage. She was taken care of and grew up there. For 6 years, she was surrounded by children of all ages, watching each of them get adopted and new orphans taking their place. She had long wished to be adopted but she suspects that something was... off... about her that made the people avoid adopting her. She was soon plucked out of the orphanage not because she was adopted, but because she was Magical. In a burst of emotion after a person had rejected adopting her, she accidentally broke the windows of the orphanage.
The Ministry of Magic soon heard about this and came to pick off Orfhlaith. The young girl was scared out of her mind that she was going to be punished for breaking the windows but the Ministry employee had comforted the girl. She was transferred to Lil'Bundles and spent a year there until she was adopted by the Mitchell-Andersons, whom she became quite attached to.
However, on the summer after her first year, a custody battle for her took place. While the custody battle was taking place, Orfhlaith was diagnosed with Scrofungulus. In the end, Orfhlaith survived the epidemic, her biological half-sister Caitríona Ó Cléirigh ultimately won the custody battle, and she was taken from the Mitchell-Anderson home. Orfhlaith became quite upset and refused to speak to Caitriona, but she did grow close to Sabina Fleming. In their 6 months in Ireland and two years in America, Orfhlaith eventually forgave her older sister and they reconciled. During their time in America, Orfhlaith attended Salem Witch's Institute. She missed her former adoptive siblings and moms and always held on to the hope of seeing them again.
One tragedy passed and another soon arrived. Orfhlaith and Caitriona got into a car accident in America, a drunk driver ramming into their car when they were on their way home. They were safely taken to the hospital, albeit Cait in the brink of death, having taken the brunt of the accident due to protecting her sister. Amazingly, they both pulled through, but not without scars. Caitriona gained a huge scar on her back while Orfhlaith's vocal cords were damaged so badly, it rendered her mute.
Eventually, she, Cait, and Sab returned to Britain and Orfhlaith enrolled back in Hogwarts again, now starting her fourth year.