Gryffindor or Ravenclaw - Hufflepuff's out of the question and I can't see her as a Slytherin
SPRING OF 1876 | Mary Elizabeth (both a part of her first name, as she has no middle) Tremlett is born on a blustery spring day to young muggle couple, Timothy and Chastity. Though money was tight - as it usually was, especially with two young children to care for - and Timothy was often absent for long hours of work, Eliza's infancy went about as smoothly as one supposed it could, and she had her older sister Sarah Jane often spent their days under the supervision of their elderly next-door neighbor while their mother went to work as a waitress.
SUMMER OF 1878 | Late August saw Eliza - much like how her sister went primarily by "Jane", her parents chiefly referred to her as "Eliza" - and her sister joined by a new younger sibling, a little girl named Amelia Louise. Being two at the time, Eliza had had a very brief interest in her new younger sister, though it had waned some once she realized that Amy wouldn't prove to be very fun company until she was a little bit older.
YEAR OF 1879 | Eliza was about as young as age three when her mother had noticed that there was anything strange or abnormal about her second-eldest child. Being that toddlers weren't very adept at handling their own emotions yet, it came as no surprise that Eliza would exhibit little flairs of accidental magic whenever she found herself upset or excited, and it was also unsurprising that Chastity - as a muggle - had been unsettled by it. Though had tried to think little of it, for surely it was just her imagination?
Baby Meg is born in the fall of that year.
YEAR OF 1881 | When their elderly neighbor decides to move in with her son - and also that she was pregnant for the fourth time - Eliza's mother becomes a full-time housewife. This naturally left Chastity more of a witness than ever to her daughter's oddities, and her rising paranoia that the other people in their village - whom she doubted would be very kind - would start to notice that something was amiss lead her to often distance Eliza from the other children. Eliza was simply told that she was needed more at home, and she spent most of her days helping her mother with household chores and looking after the younger ones.
(LATE) WINTER OF 1882 | Much earlier than anyone had expected, Chastity went into the labor with her fourth child one wintry night in late January. With the roads already unsurpassable due to thick layers of snow and more coming down relentlessly without any sign of stopping, there was already little hope that a midwife could be fetched quickly, and by the time Timothy had returned, it was too late. Little Anne Marie Tremlett, just as frail as she was tiny, lasted all of two hours before taking her final breath in the wee hours of the morning.
SPRING OF 1882 | If anyone were to ask Eliza what the one good thing was to come out of her mother's ordeal (postpartum depression), she'd say that it was moving in with her grandparents in May of 1882. With work taking up so much of their father's time and their mother in recovery, the girls were sent to live with their Tremlett grandparents in Liverpool indefinitely - and Eliza had absolutely loved it there.
Thomas and Elizabeth (for whom Eliza was named) Tremlett lived in a small three-bedroom on the outskirts of the city. It was often cramped, with six people and two rambunctious wolfhounds, and the girls all had to share one bedroom, but they could easily forgive that for all of the precious memories they collected there. Eliza, in particular, could still remember playing and making friends with the children in the neighborhood (something she'd rarely gotten to do whilst living with her mother), her grandfather reading them all sorts of fairytales, legends, and myths every evening before bed, sitting with her grandmother on the front porch with tea and biscuits while she taught them how to read and write - all memories that she held close to her heart, and served to form her into the person she was today.
YEAR OF 1883 | Apparently Chastity wasn't the only one to notice that Eliza wasn't completely normal, and her grandfather - whom hadn't been witness to such strange happenings since his own childhood - (reluctantly) called upon his sister to confirm his suspicions. It was news to the girls that their grandfather had a living sister - they had heard of the sister who had died very young, at around age 11 or so, but never one still living - and they could immediately tell that there was something different about her. Not only did she appear a bit more well-off than they were, and she had brought with her a rather subdued female companion whom could not have been much older than 14 or 15, but their normally upbeat grandfather appeared almost nervous and wary in her presence, as if he knew something terrible about Josephine that the others didn't. But puzzling most of all, however, was her particular interest in Eliza - asking her strange questions, studying her intently as if she was trying to look for something specific, and observing her every move with an almost hawk-like quality that it had unnerved Eliza enough to cause one of her grandmother's favorite flower vases to crash to the floor, just for some kind of distraction.
Fortunately, the flower vase incident was enough to satisfy the woman (and confirm Thomas's suspicions), and the two spent the rest of the visit in hushed conversation before Josephine leaves abruptly.
JUNE OF 1884 | Nothing comes of Great-aunt Josephine's strange visit until almost a year later, when the Tremlett girls' father suddenly dies from a work-related accident. With a deceased father and - by all accounts - a mentally ill mother, their grandparents had automatically got custody of them, and Thomas reached out to his sister again. Their son's death - and consequently their unexpected return to parenthood - was hard enough on his wife without then discovering that their granddaughter was a witch, and summer of that year saw Eliza tearfully leave behind her sisters and everything she knew, for the quaint little town of Irvingly where her Great-aunt resided with her two charges.
YEAR OF 1884 - PRESENT | The story that their great-aunt had chosen Eliza to provide a good education for hadn't been too far-fetched, though her initiation into the wizarding world had been a gradual one, regardless. As open-minded as Eliza could be, she had been a bit skeptical at first, but soon she became utterly fascinated, and the years leading up to the present had been spent educating herself on this new world that she hadn't even known existed until a few years before. A feat that was made easier with the help of her aunt's two older charges, a muggleborn and a squib, named Georgia and Edith. Georgia's - the muggleborn Ravenclaw - recounts of her adventures at Hogwarts leaves Eliza quite excited for the time when she would get to go too, though tries not to talk about it too much, for she often notices that any talk of Hogwarts makes Edith upset.
Though she's not allowed to tell her sisters of the real reason she was sent to live with Great-aunt Josephine, she still keeps in contact with them - Jane, in particular - and spends both a few weeks of the summer and Christmas with her grandparents. As for her great-aunt, she honestly wasn't that bad. A bit formidable yes, but one had to be when dealing with children between the ages of 11 and 17.
And this is where Miri gives up.