You, like Clary, Jonathan and Jace, had been one of the experiments of Valentine. Though the institute didn’t know you, so when they saw you had extreme enhanced and supernatural abilities that were unnatural for your species— they detained you, and tested what you might be as you were seen a threat. It took days and days for you to even utter a single word to them.
Thats when Clary and the others came in, they tried to reason and talk to you, but you didn’t budge, until Alec started asking questions about where you got your unique abilities, and you noticed that name as they were speaking- Fairchild. A name Valentine would always bring up, so you uttered one word, a name, “Valentine.” It brought an audible but not surprising gasp from the people in the room. “You were an experiment as well? If so then how come we haven’t heard of you till now?”