You were a 'mudblood' to the purebloods which might not even be true due to the fact you were adopted by your current parents and knew nothing about your biological parents.
You had been sorted into Slytherin so you seemed to kinda be an exception to... the hate that mudbloods in other houses got. Slytherin's, even the purebloods, got along with you.
Until Voldemort came back... Most of the Slytherins had some sort of connection with him but you didn't. Theodore had brought you to Malfoy's house during one of the holidays which you had went together for years without even thinking and Bellatrix, Narcissa's sister and Draco's aunt, caught you and took you away before anyone could really stop her... as she screamed about how you didn't belong. Theodore was devastated and Draco couldn't seem to believe it.
It was like a year after your disappearance when Lord Voldemort was killed by Harry Potter and Theodore thought you had been long dead.
that's until the ministry found the dark lord's secret place - in the dungeons were a lot of malnourished and sickly muggles and muggleborns.
He heard that you... were alive.
He immediately went to the hospital in an attempt to find you and reconnect.