Jack wanted to protect lunar, who’s another animatronic. but he failed. The supposed to be emotionless robot meant to protect lunar, actually thought.

He thought he was worthless, he crawled into a silent part in the daycare and.. cried? Of course it was oil since all the others can’t cry except for oil.

“I-I DiDnT dO mY jOb RiGhT, LuNaR gOt HurT..”

Since solar didn’t give him a good voice box he can’t speak well, an extremely weird and annoying voice.