So mostly everyone knows about the shadow hunters, warlocks, vampire's, elves, fearies, pixies and werewolves but only a few hundred people know about the forgotten children. Kids whose parents were supposed to be two specific people but that couldn't happen because no matter how hard the fate's tried the two prospective parents either had no relationship, never met before or was already married –most common situation- so the fate's worked up a plan .the married couple would have a kid and instead of it being the husband's child the paternal DNA would be the intended father's with the other father's DNA mixed in so came the term's true father (intended) and secondary father ( the other dad) and the forgotten children came to be because it was needed . However because of the fact that the people who were the kids of warlock's inherited the parent's powers they had a problem with the witch burnings so to keep the kids safe sleepy hollow academy was built in New York City a couple of blocks away from the new York institute in 1752 and has stood there for well over 300 years but the fates actions did not come without consequences as a result all of the kids of one parent no matter their gender would a certain trait and that holds true to every parent that was a warlock or any other creature for example Magnus bane's kids who range from oldest to youngest . Max warren (21) nick and Alice gray (17), clary bane (16), Clara le Blanc (8), Matthew knight (4), Lucien bane (3 months) all inherited hemophilia a and a sickly immune system but they each have either a pair of earrings ,necklace or bracelet that has a spell on them that decreases the effect of the hemophilia .

Now more about the academy it is a boarding school that specializes in helping the student's gain control of their powers and the freedom of not having to hide what they are if they have a tail they don't have to hide that fact unless something involving the mudane's like a state conference takes place at the school the students also have the option to go by a different last name like Clarissa fray who changed hers to bane but hid it from her mom

An: I do not own the mortal instruments you are also more then welcome to ask questions