I love rumours! As your character can't know mine, I can tell you what you could have figured out yourself: Trish is very insecure inside, she copies other people. Her family story has been discovered last year already, she has a fay half-sister... Don't know if I can really give you something interesting... Oh maybe one thing: She made two teachers fall in love last year with a love potion she invented. She should have apologised to Mrs. Hemlock and Mrs. Anikina. She faced Mrs. Hemlock, but never Anikina, because she was afraid. She is terrified that someone might remeber and bring this up again so she would have to face Anikina. Oh and she failed the Charms test, so she never graduated Charms because she was possessed during the test and behaved really, really silly.