Scenario 1: 
Error was once again fighting ink, because of his destruction. Error get's Ink pinned to  the floor ready to kill. Ink out of panic uses the small bottle with liquid emotion as it spills over Error, he stopped the attack as he changed to a whole other person.
(For good or bad? that's your choice)

Scenario 2: 
Error was being manipulated by nightmare, doing exactly what he was told to.
He wasn't allowed to do anything but  anything he was told to, Ink thought he was acting weird he follows him and sees how he gets pushed around. He tries to get close to him trying to talk about how he was feeling.

Scenario 3: Custom