"Ahoy, Mateys I be Mangle!" is his intro. Like the other toy animatronics, she was released after the original quintet of haunted robots. He may possibly be related to Foxy and close friends with BB.
Mangle was first introduced in "IF FOXY WAS THE PHONE GUY 2", only making a small cameo on the night 3 phone call in the background, but she sounded like a male than his female voice now. This old Mangle voice almost made Eth not release the video.
over the months, Mangle started to play more games and gained her voice and personality he now has today.
*Mangle actually had two voice changes. In her second appearance when he played night 6 of FNaF 1, her voice almost sounded both male and female.
*In almost every thumbnail Mangle is present in, his second Endo head is too, but her second head never speaks.
They were a victim of the Fazbear Massacre and became a phantom. Thus, they fell under Springtrap's control and worked to kill the remaining Fazbear residents.