Phineas Fletcher was criminal who dealt in illegal items and creatures. He was responsible for the accidental creation of the Hidebehind (FB).
Hidebehinds, which favor humans as prey, were created out of mating between Fletcher's Demiguise and a ghoul aboard the ship. Fletcher was cruel to the creatures he controlled, and Magizoologists speculate that this could be the reason Hidebehinds target humans (FB).
Possibly a distant relation to Mundungus Fletcher..?-EJ