Quem no Potterverse consegue fazer mágica apenas tarde na vida?

Q: Will there be, or have there been, any “late blooming” students in the school who come into their magic potential as adults, rather than as children? By the way, I loved meeting you, and hearing you speak, when you came to Anderson's in Naperville. I can hardly wait until you tour again.

JKR: Ahhh! I loved the event at Anderson’s. It was one of my favorites. That is completely true. No, is the answer. In my books, magic almost always shows itself in a person before age 11; however, there is a character who does manage in desperate circumstances to do magic quite late in life, but that is very rare in the world I am writing about.

(src: Barnes and Noble interview with J.K.Rowling, March 19, 1999)

A quem se refere JKR em "há um personagem"?

Claramente, não é um estudante; então o palpite mais óbvio de "Neville Longbottom" está errado - ambos devido a "não" resposta em relação à questão em si, e ao fato de Neville florescer em seu sexto / sétimo ano, bem antes que você possa legitimamente chamar "bastante tarde" .