Lefty

Lefty is an animatronic from Freddy Fazbear's Pizzeria Simulator. He is a black bear with red cheeks, a red top hat and bow-tie, and a golden star on his chest. He is missing his left eye and has a golden right eye, and he holds a gold-and-silver microphone in his left hand.

Gameplay Mechanic
Lefty sits in the closet off of the left hallway, and he becomes more agitated as the office becomes too hot or too noisy. His levels of agitation will gradually increase until Lefty attacks the player; the only way to calm him down is to switch on the Global Music Box (as he can’t be soothed by the Marionette’s music box), which will keep the other music box wound at the expense of extra power usage.

Death Screens
Lefty will jumpscare the player with the same sound effect as the other Pizzeria Simulator animatronics. He has several lines of dialogue that will play over the "Game Over" screen, presumably spoken by the Marionette, who is trapped inside Lefty:
 * “Shhhh… it will all be over soon.”
 * “Shhhh... there is room for one more.”
 * “Shhhh… come spend eternity inside, with me.”
 * “Shhhh… I’ve been looking for you, and now I will never let you go.”
 * “Shhhh… I’m so glad that I’ve found you. Let me make room for you.”