Mattheo, Draco, Theodore, Regulus, Lorenzo and Blaise are the infamous group at Hogwarts. You on the other hand were a siren- or mermaid. They couldn’t tell which yet. Dumbledore had found you and knowing that if the dark lord got his hands on you it could end badly for the school

they first kept you in a bathtub but after realizing that you could escape- which you did. They instead did some magic and now you were living in a giant pool with shiny rocks and coral and stuff like that