The Panther was one of the three members of the Forty Thieves (aside from Salim al-Kupar) remaining by the time Miss Decibel arrived in Ancient Arabia. He, along with the other two thieves, the Lion and the Tiger, were captured by Decibel and forced to do her bidding. The Panther was later rescued by Salim and not touched by Decibel's forces ever again.
According to Miss Decibel, his favorite food is scorpion claws.
The Panther was the only thief of the three to be rescued by Salim rather than Sly.