Rubeus Hagrid time. It's unknown if Fang is still alive when Harry's children come to Hogwarts. Fluffy is a giant three-headed dog provided by Hagrid to guard the trapdoor leading to the underground chamber where the Philosopher's Stone was hidden until the end of "Philosopher's Stone". The only known way to get past Fluffy is to lull him to sleep by playing music. Fluffy is based on Cerberus, the three-headed dog from Greek mythology that guards the gates to the underworld. As with Fluffy, Cerberus was lulled to sleep with music by Orpheus. In "Philosopher’s Stone", Harry, Ron, Hermione and Neville accidentally
Pluto (mythology) Pluto (mythology) Pluto (Latin: "Plūtō"; , "") was the ruler of the underworld in classical mythology. The earlier name for the god was Hades, which became more common as the name of the underworld itself. In ancient Greek religion and mythology, Pluto represents a more positive concept of the god who presides over the afterlife. "Ploutōn" was frequently conflated with "Ploutos" (Πλοῦτος, Plutus), a god of wealth, because mineral wealth was found underground, and because as a chthonic god Pluto ruled the deep earth that contained the seeds necessary for a bountiful harvest. The name "Ploutōn" came into widespread usage