Odd Bob/Elijah Spellman

The Pied Piper was an energy entity originally from the Jeggorabax Cluster, a region known to house beings feeding on emotions. The Pied Piper manifested a need for fear in order to break loose from a piece of rock it was bound to, known as the Weserbergland meteorite.

The entity crashed to Earth in the Weserbergland Mountains in Lower Saxony in 1283, and by 1284 had broken loose from the meteorite by feeding on the local inhabitants' fear of the plague. He acted benevolent to the people of Hamelin and rid them of their infestation. However, they refused to pay him and as his first major act, he used his powers to lure the children away in order to elicit fear from their parents; thus he became known as the Pied Piper.

In 2009, he set up Spellman's Magical Museum of the Circus in London in order to steal children from the city. This was made possible by the fact that the Weserbergland meteorite was on loan to the nearby Pharos Institute. The now adult Sarah Jane Smith prevented him from stealing the children, but he abducted Luke Smith and imprisoned him in his hall of mirrors. With the help of Rani Chandra and Clyde Langer, Sarah Jane overcame her fears, which weakened him to the point where she could force him back into a fragment of the Weserbergland meteorite. She then placed the fragment in an alien box from which nothing could escape.

The Pied Piper was a very powerful entity. Its powers included teleportation, telekinesis, telepathy, shape shifting, limited reality-warping and mind control, although the victim needed to touch or be holding something for him to channel it into them, such as the balloons or tickets. The entity needed fear to power his abilities and keep himself in existence. He was greatly susceptible to laughter as it weakened his power, since he fed off fear.

Shape shifting was one of his powers. The Pied Piper transformed his body, clothes and voice to new forms; he only showed three forms in total to Sarah Jane but hinted he could have more. Unless he was trying to lure children into his trap to feed on their parents fear, the Pied Piper stayed as Elijah Spellman and ran "Spellman's Magical Museum of the Circus".

_{Biography from the TARDIS Data Core article, licensed under CC-BY-SA}